PT&P designed twelve constant spring support assemblies for a chemical plant in New Jersey. The assemblies will be used as replacements in a recuperator "up-leg" and "down-leg" application in conjunction with custom cross-over supports previously fabricated by PT&P. Physical sizes of these constant assemblies range from 18-1/2" x 22" x 64" to 18-1/2" x 26" x 83". Operating loads range between 8,000 lb. – 19,000 lb. and each allows for upward movement between 6" – 9". The spring coils are coated with epoxy instead of the standard neoprene coating. Standard load and travel tests were completed prior to shipment.
Constant spring supports find applications in various fields and can be made from diverse materials tailored to specific end applications. These supports are integral in industries such as petrochemicals, LNG, refining, power generation, steel mills, and geothermal plants, among others. In the past, obtaining a custom-designed constant spring support posed a significant challenge in terms of both design and manufacturing, with lead times extending to a minimum of 6-8 weeks.
Through a dedicated focus on manufacturing optimization and employing a design-centric engineering approach, we have successfully reduced the required manufacturing time by more than half. Now, the process of acquiring custom constant spring supports is significantly streamlined. In fact, we are capable of fulfilling emergency orders in less than 24 hours, taking into account the client’s location and urgent requirements.
PT&P REF. ORIGINAL POST 01232017
Constant Spring Supports for an Oil Refinery in Texas
Type:
Constant Spring Supports
Material:
Carbon Steel w/ HDG Finish
Design:
4,000 lb. Load | 3 1/2″-9 1/2″ Vertical
Testing:
Load and Travel Tests
PT&P custom designed and manufactured ten 200 U-Type constant spring supports with slide plates for an Oil Refinery in Texas. They are fabricated from A36 carbon steel with an HDG finish for plates, angles, and cans. Its dimensions are 31" in height and 52" in length with 19" in width. They are designed for a movement of 3 ½" up to 9 ½" and an operating load of 1100 lbs up to 4800 lbs. They were custom-designed to match the box dimensions of a competitor. The units had a Standard Load Test performed prior to shipment.
Constant springs are sometimes installed near rotating equipment such as pumps and compressors used in manufacturing, mining operations, utilities, oil and gas extraction, and cross-country pipelines. By providing constant support to piping leading to rotating equipment subject to both vertical and horizontal movement, these types of spring hangers help to decrease stresses imposed on rotating equipment, thereby extending the life of the bearings and seals within these units.
For this application, our constants were designed and manufactured with carbon steel; however, depending on application requirements, such as a furnace, we can also provide constant spring supports utilizing stainless steel material, which accommodates high temperatures and corrosive environments. We created the world’s smallest constant spring support. Our nano constant is ideal for such applications:
PT&P REF. ORIGINAL POST 10202020
Compact Spring Supports Designed for a Heat Exchanger at a Large Oil Refinery
These compact spring supports were custom-designed to support a heat exchanger at an oil refinery. They were designed to support loads up to 12,000 lb. and a movement of 0.039", with space limitations of 3"in height. These compact springs are fabricated from carbon steel and utilize engineered Belleville (disc spring) washers. 25% glass-filled (PTFE) slide plates are bonded to the top of the load flange and provide a low coefficient of friction. The DST Compact Spring Support is specifically designed to relieve excess loading on process equipment. Benefits: Minimizes excessive loads on sensitive equipment, same load for smaller working range (25-50% less space), ideal for locating under equipment flanges & reduces design time, maintenance cost and accidents.
PT&P REF. ORIGINAL POST 11172020
F-Type Variable Spring Supports Designed for a Petrochemical Plant in Canada
Type:
F-Type Variable Spring Support Assemblies
Size:
Heights up to 12-3/4”
Spring Casing Diameters from 6-5/8” to 8-5/8”
Base plates from 9″x 9″ to 13-1/4” x 13-1/4″
Design:
Operating Temp.: -49°F to 122°F
Operating Loads from 697 lb. to 6093 lb.
Movements of 0.04″ to 0.2”
Material:
Hot-dipped Galvanized Carbon Steel
Testing:
Load & Travel Test | Q.C. Inspection
Piping Technology and Products, Inc. recently designed and manufactured F-Type variable spring supports with internal load columns for a petrochemical plant in Canada. The variables are fabricated from carbon steel that is able to accommodate low temperatures (A516-GR. 70N). The operating temperature ranges from -49°F to 122°F while supporting operating loads from 697 lb. to 6093 lb. and movements of 0.04″ to 0.2″. They are designed to accommodate installed heights up to 12-3/4″, with spring casing diameters from 6-5/8″ to 8-5/8″, along with base plates from 9″x 9″ to 13-1/4″ x 13-1/4″ for installing either by bolting or welding in the field. Load and travel tests, along with visual Q.C. inspections were performed before shipment.
Variable supports are typically used for the following considerations in piping systems:
Compensating for Thermal Expansion
Maintaining Stress and Load
Installation in Piping Systems
Maintenance
Supporting Heavy Loads
Variable spring cans play a crucial role in maintaining the integrity and stability of piping systems by compensating for thermal expansion or contraction, supporting heavy loads, and allowing for vertical movement. They are essential components in industries such as petrochemical, power generation, semiconductor, refining, paper and pulp processing, and other applications where large-scale piping systems are employed.
Variable spring cans come in a variety of designs and are constructed using different materials to suit specific applications and environmental conditions. Materials commonly used for variable spring cans include carbon steel, stainless steel, and special alloys. The selection of materials is crucial to ensure that the device can withstand the corrosive effects of certain fluids or harsh environmental conditions.
PT&P REF. ORIGINAL POST 05192020
600,000 lb. Load Mega Ton Spring Support with Bronzphite® Slide Plates
A total of eight big ton spring supports, “Mega Tons” were designed and manufactured to support two reactors in a power plant weighing approximately three million pounds each. The mega ton pictured incorporated eighteen individual spring coils to produce a load capacity of approximately 602,000 lb. and a spring rate of 112,500 lb./in. It was designed with eight Bronzphite® slide plates that measured 12″ x 12″. The 12″ x 12″ slide plate selection was based upon the ability to position individual squares across the load flange surface while simultaneously providing the total slide plate surface area required to support the operating loads.
By using individual slide plate squares, the fabrication and assembly time was reduced because a standardized mounting procedure could be incorporated and repeated as necessary for each big-ton load flange subassembly. Overall, the slide plates were incorporated into the design to reduce the horizontal forces which would be imparted onto the big-ton spring’s load flange during lateral deflection (movement) of the reactor.
Bronzphite® slide plates, in particular, were selected because these big-tons will be used in a location which will see continuous “cold-to-hot” operating cycles and as a result, the robust nature of Bronzphite® proved more advantageous than other types of slide plates. The other two designs used nine slide plates, one with fifteen individual coils to produce an operating load of 594,000 lb. and a spring rate of 250,050 lb./in. The other design had an operating load of 285,000 lb. and a spring rate of 106,000 lb./in.
In addition to designing and manufacturing the Mega Ton spring supports, we were tasked with testing them to confirm they would operate in the actual conditions for which they were designed to operate at the requested loads. Therefore, we custom designed and manufactured a test apparatus and incorporated the use of a special load cell to ensure proper operation throughout the entire working range of the coils. The “mega tons” were then set to the cold (installed) load as specified. Testing was developed and done by our in-house manufacturing, quality and engineering teams.
PT&P REF. ORIGINAL POST 03072012
U-Type Constant Spring Supports Designed for a Power Plant
Type:
Constant Spring Supports
Material:
Carbon Steel | HDG | PTFE, 25% Glass Filled
Design:
8,200 lb. Load | 11-1/2″ Total Travel
Testing:
Standard Load and Travel Test
PT&P designed and manufactured 48 constant spring supports for a power plant in Mexico. The constants pictured above are Fig. 200 U-type constant spring supports fabricated from A-36 carbon steel and include PTFE, 25% glass-filled slide plates bonded to the load flange. The supports are 39″ H x 26″ W x 80″ L and are designed for operating loads up to 8,200 lb., with a total travel of 11-1/2″. These are horizontal constants designed to support piping from below in conjunction with a pipe saddle. All the constants went through standard load and travel testing per MSS Standards prior to shipment.
Constant spring supports find applications in various fields and can be made from diverse materials tailored to specific end applications. These supports are integral in industries such as petrochemicals, LNG, refining, power generation, steel mills, and geothermal plants, among others. In the past, obtaining a custom-designed constant spring support posed a significant challenge in terms of both design and manufacturing, with lead times extending to a minimum of 6-8 weeks.
Through a dedicated focus on manufacturing optimization and employing a design-centric engineering approach, we have successfully reduced the required time by more than half. Now, the process of acquiring custom constant spring supports is significantly streamlined. In fact, we are capable of fulfilling emergency orders in less than 24 hours, taking into account the client’s location and urgent requirements.
PT&P REF. ORIGINAL POST 08202017
F-Type Variable Spring Supports with Graphite Slide Plates
Type:
Variable Spring Supports with Graphite Slide Plates
Materials:
CS | HDG | High Heat Aluminum Finish | Graphite
Load Range:
420 lb. to 7650 lb. | 0.65″ Upward Movement
Design:
700°F Temperature | Q.C. & Load Tests
PT&P custom designed an F-type variable spring supports with graphite slide plates for an oil refinery in California. Client inspection O.C. inspections and load tests were conducted prior to shipment.
The graphite slide plates are used to accommodate the axial and lateral movement of the pipeline. Each assembly is equipped with specially designed “round” base plates (instead of the standard square plates) and is designed for temperatures up to 700°F. The spring cans are designed for a load range from 420 lb. to 7,650 lb. and movements up to 0.65″. In this case, they are finished with high-heat aluminum instead of our standard hot-dipped galvanized finish due to the high-temperature requirements in which these units will be operating. We have the unique capability to work with different materials based on the design needs. Variable spring supports, along with our array of engineered support solutions, stand as a fundamental pillar of our business. They enable us to actively collaborate with our clients, whether it involves the products we’ve manufactured, systems subjected to pipe stress and Finite Element Analysis (FEA), or items serviced through the expertise of our field service team.
For many of our products, we have the ability to build and deliver support in less than 24 hours should an emergency arise. It is useful to keep our emergency information handy on your phone and computers should an unforeseen moment arise. Please share this with your maintenance, fixed equipment, and reliability teams. To bookmark or for more information about our emergency assistance, please click here.
PT&P REF. ORIGINAL POST 09242018
Big Ton Spring Supports Designed for a 98,250 lb. Load
Type:
Big Ton Spring Supports
Size:
29″ wide x 110″ long x 35″ high
Material:
HDG Carbon Steel | A193 Gr. B7 Travel Stops and Load Column
Design:
98,250 lb. | 1-3/4″ Upward
Testing:
Load Cell Test
This big ton spring support assembly was designed for a facility in Kansas. For this application PTP’s big ton was used to support heat transfer and steam generating equipment typically used in fossil fuel power generation, combined cycle power generation, petrochemical, and process industries.
Big Ton spring supports are extremely stable. Base supports springs of this design are frequently used under horizontal pressure vessel saddle supports in combination with slide plates or roller supports. Our Big Ton design lends itself ideally to this support situation. Type F design is sufficient where there is a minimal amount of lateral movement, but where the combination of heavy loads and thermal expansion are required, Big Ton industrial springs should be your choice.
The big ton assemblies were fabricated from hot-dipped galvanized carbon steel and include neoprene coated springs coils. The travel stops and load column material is A193 Gr. B7. The units measure 29″ wide x 110″ long x 35″ high and are capable of supporting loads up to 98,250 lb. while accommodating movements from 1-3/4″ upward. The big tons were tested at our facility with a load cell designed by our team to ensure proper operation throughout the big ton’s operating range.
Alongside our ability to design and manufacture big tons specific to your system needs, our field service team is readily available to service, audit, maintain, and/or assist with installation of such products. For more on installation and maintenance take a look at our resource page: big ton installation-maintenance
PT&P REF. ORIGINAL POST 07252017
Constant Spring Supports Custom-Designed for a Large Crude Oil Processing Facility
Piping Technology & Products custom-designed constant spring supports for crude oil processing at one of the largest refineries in the world. Petroleum refineries change crude oil into products such as jet fuel, gasoline, polypropylene, polyethylene, propane, sulfur, carbon black feed, and diesel that can be used for transportation, heating, feedstocks for making other chemicals, generating electricity, renewable energy, and paving roads. Piping Technology and Products was awarded this project because we were the only engineering manufacturing firm vendor of constant spring manufacturers in the world that could both design, manufacture, and test these units for the unique design conditions. These constant springs will support loads ranging from 88,185 lb. to 143,300 lb. They are designed for temperatures up to 650°F, and movements of 0.39" up, 4.72" down, -2.36" up, and 0.39" down. The Type-C constants are 67" H x 21" W x 88.25" L and the Type-F constants are 85" H X 39.75" W x 86.56" L.
The F-Type springs will include graphite slide plates and are designed to support the piping from below while allowing both lateral and axial movement. All constant assemblies underwent magnetic particle inspection of welds, travel, and compression tests. Additionally, a special “cramp test” was conducted on each spring coil. A "cramp test" is done by compressing the spring coil by a specified length for a specific period of time. This assures the spring’s functionally especially when a large "wire diameter" is used to manufacture the spring coil for these high loads. At Piping Technology and Products and our subsidiaries, we specialize in designing pipe supports, expansion joints, and insulated supports for unique applications involving products not readily available. Our products are used in the CDU (crude distillation units), hydrocracking units, RFCC (residual fluid catalytic cracking), naphtha hydrotreater, and hydrodesulfurization units (also known as alkylation unit), and sulphuric acid regeneration (SAR) units in refineries.
PT&P REF. ORIGINAL POST 07272021
Saddle Support Spring Isolators for an Old Steam Chest Saddle
PT&P custom-designed and fabricated "saddle support spring isolators" to replace the previous springs originally designed in 1974 for supporting an old steam chest saddle at a chlor-alkali chemical plant. Chlor-alkali plants use salt and electricity to produce caustic soda and chlorine gas. Downstream, the chlorine gas – either wet or optionally dry – can be reacted in a chemical process to produce bleach, other chlorine derivatives, or chemical feed stocks finding its way into the production of glass, plastics, pulp, paper, textiles, vinyl, antiseptics, insecticides, and a water treatment agent and in some soaps and detergents. Rising demand for chlorine and caustic soda in various industries such as automotive, pharmaceuticals, paper, and chemicals are driving the chlor-alkali market. Due to improvements in the manufacture of spring coils, PT&P’s engineering team suggested improvements to the original design using a more well-suited design that exceeds the original design specifications. These saddle supports include PTFE, 25% glass-filled slide plates bonded to the top of the assembly. They are designed to support up to 32,000 lb. each with a 6,250 lb/in. spring rate. These springs do not have the traditional spring housing typically used to encase the spring coil, instead, they are fabricated utilizing carbon steel plates in conjunction with chains and internal components. See diagram below.
The spring coils are alloy steel and were custom designed per this customer’s specified wire dia, active/total coils, and solid height. The spring supports were load tested and a quality control inspection was completed that included MAG Particle Inspection. PT&P can replace existing custom variable spring supports using the original design drawings from plants built more than 50 years ago. PT&P can also reverse engineer any spring hanger by taking detailed measurements of the support in the field and sending the information back to our shop for a quick lead time during a plant turnaround or shutdown. Many of the custom spring supports that PT&P has supplied to replace original equipment have been in service for more than 40 years.
PT&P REF. ORIGINAL POST 11022021
G-Type Variable Spring Assemblies Designed for an Oil & Gas Refinery in Texas
PT&P designed these G-Type variable spring support assemblies, along with a 24" diameter pipe shoe and hanger, for an oil and gas refinery in one of the largest refineries in Texas that was also the recipient of the American Fuel Manufacturers 2022 Innovation award. Our variables were for the refinery coker unit, which typically converts the residual oil from the vacuum distillation column into low molecular weight hydrocarbon gasses, naphtha, light and heavy gas oils, and petroleum coke.
Each variable spring support assembly was designed with a center-to-center of 36" and an elevation difference of up to 72". The spring supports consist of a G-type variable spring, all threaded rods, clevis, lifting lugs, welding lugs, and clevis pins. They are designed with an operating load range from 1,700 lb. to 10,500 lb. and a movement range of .02" to .19" up or down. Standard load and travel testing was completed before shipment.
The refinery was originally constructed in the 1930s. PT&P and our subsidiaries have deep experience with maintenance and replacement work at existing facilities to keep them running and producing for our clients. Our field service teams are available to do an audit, inspection, or replacements of variable spring cans based on your needs.
PT&P REF. ORIGINAL POST 08092016
Constant Spring Support Assemblies for an LNG Plant in Central Africa
Type:
Constant Spring Supports
Material:
A36 Carbon Steel w/ HDG Finish
Design:
1,790 lb. Load | 8″ Vertical
Testing:
Load and Travel Tests
These constant spring supports were modified to increase their installed height. The constants range in size from 20.5″ in height 38.75″ in length, and 13″ in width. They’re designed for up to 1790 lb. load and a vertical movement range of 8″. All constants were fabricated from A-36 carbon steel and hot-dipped galvanized. Each assembly went through standard load and travel testing per MSS Standards. The constants were shipped within 6 to 8 weeks to a Liquefied Natural Gas (LNG) plant in Africa.
LNG is natural gas cooled down until it reaches a liquid state. In its liquid state, natural gas is easier to transport by large ships when pipelines are not feasible. Over the years, we have supplied insulated and spring hanger supports to gasification and degasification plants. Our long history in the arena has helped us become the vendor of choice by offering the full scope of our services from testing, engineering & design, manufacturing, and Field Service.
For this application, our constants were designed and manufactured with carbon steel; however, depending on application requirements, such as a furnace, we can also provide constant spring supports utilizing stainless steel material, which accommodates high temperatures and corrosive environments. We created the world’s smallest constant spring support. Our nano constant is ideal for such applications:
The applications for constant spring supports range in industry verticals we have built and designed for. In addition to LNG clients, we have designed and built constants for refineries, geothermal plants, petrochemical plants, and renewable energy facilities. The use applications include coker replacement, debottlenecking of the furnace, installation of a new VDU (vacuum distillation unit) heater, tube and heater replacement, and flare gas recovery units. Constant spring supports alongside our portfolio of products are shipped worldwide from our Houston, Texas headquarters, where all our products are manufactured. We are open for plant tours. If you are interested, please let us know so we can schedule some time with your team.
PT&P REF. ORIGINAL POST 06192018
A-Type Variable Spring Supports for a Process Power Plant in Oklahoma
Type:
Variable Spring Supports
Size:
Rod Diameter 2” / Casing 8′ long & 3 1/8” Diameter
PT&P designed two standard PTP-4 size 210 A-type variable spring supports for a process power plant in Oklahoma. The springs are fabricated from A36 carbon steel with a hot-dipped galvanized finish. The springs are designed to accommodate a hydro test load of 34,000 lbs. with an operating load of 31,563 lbs. and an installed load of 29,000 lbs., with the movement of 0.82″ downward. Standard load and travel tests were conducted on the variables before shipment. The specially designed springs utilize a rod diameter of 2″ and the spring casing 8′ long and 3 1/8″ in diameter.
In addition to the products we offer, we also have an experienced field service team. Over 80% of the field service we do is for engineered supports, including constant and spring supports. Inspecting pipe supports in high-energy piping systems such as refineries, chemical plants, and power plants is critical for ensuring safety and reliability. Neglecting these inspections can lead to major consequences detailed below:
Structural Failures: Over time, pipe supports can weaken due to corrosion, vibration, or other factors. Without inspection, undetected defects can result in the failure of these supports, causing pipes to sag, bend, or even rupture. This can lead to catastrophic accidents and expensive repairs.
Leakage: When pipe supports degrade, they may cause pipes to shift or disconnect, leading to leaks at flange connections and other types of connections in high-pressure systems caused by pipe strain. These leaks can release hazardous substances, causing environmental damage, health risks, and operational disruptions.
Reduced System Efficiency: Improperly supported pipes can experience increased friction, causing higher energy consumption to maintain the desired flow rates. This inefficiency can result in increased operational costs and decreased overall system performance.
Loss of Containment: In high-energy piping systems, failure to inspect supports can compromise containment integrity. A pipe rupture or leak called a “failure in the pressure-containing boundary,” can release hazardous materials, posing serious risks to personnel, nearby communities, and the environment.
Regulatory Non-Compliance: Many industries are subject to regulations and standards governing the inspection and maintenance of high-energy piping systems, including ASME B31.1 and 31.3 and API570. The implications of non-compliance can result in legal consequences and fines.
Increased Maintenance Costs:With regular inspections, minor issues can be managed so they do not escalate into costly and timely major problems such as extensive repairs or complete system replacement.
Loss of Productivity:Unexpected failures and repairs can disrupt production schedules and lead to unplanned downtime, causing financial losses and impacting the company’s reputation.
Correct installation and regular inspections are essential to mitigate risks and ensure industrial facilities’ safe and efficient operation. We have a team of engineers and technicians who are qualified to inspect pipe supports and expansion joints and can assist with diagnosing problems, replacement, and identifying models, types, and sizes. We provide field service to our clients for all product categories we manufacture, even if we are not the OEM because serving our clients is our first priority.
PT&P REF. ORIGINAL POST 11272017
F-Type Variable Springs with Rollers
Type:
Variable Springs w/ Rollers
Size:
Springs: 11.1/16″ H | Rollers: 24″ -36″ Dia.
Design:
700-15,970 lb. Loads | 650°F Temp.
Material:
HDG Carbon Steel | Cast-iron
Testing:
Standard Load Testing & Q.C. Inspection
Variables use coiled springs to support a load and allow movement. The resistance of the coil to a load changes during compression, which is why these devices are called “variables”. We offer a variety of different designs of variable spring pipe supports. View Variable Spring Supports Product Section.
For this application, the variable spring with rollers were used in natural gas compressor stations in Texas. Compressor stations are an essential part of a natural gas pipeline that moves natural gas from one location to another. At these stations, natural gas is re-pressurized and sent back into the pipeline system where it travels until the next compressor station. The location and distance between compressor stations is dependent on terrain, and the number of gas wells in the vicinity. Frequent elevation changes and a greater number of gas wells will require more compressor stations.
The compressor station, also called a pumping station, is the “engine” that powers a long-distance natural gas pipeline. As the name implies, the station compresses the gas (increasing its pressure) thereby providing energy to move it through the pipeline. The compressor is driven by a motor fueled by some of the natural gas bled from the pipeline. The size of the station and the number of compressors (pumps) varies, based on the diameter of the pipe and the volume of gas to be moved.
Piping Technology and Products and its subsidiaries provide products and services to this critical piece of the energy infrastructure with not only variable spring supports with rollers showcased here, but also with insulated supports, expansion joints, pipe shoes, guides, and anchors.
PT&P REF. ORIGINAL POST 02172020
U-Type Constants Designed with Slide Plates for a Polypropylene Plant in Texas
PT&P designed and fabricated a U-Type constant spring support , with PTFE and a 25% glass-filled side plate for a Polypropylene Plant in Texas. The constant is fabricated from carbon steel and hot-dipped galvanized for extra protection against corrosion. The vertical movement is 1.5" total upward travel and is capable of supporting a load of 10,350 lbs. throughout its range of movement. The constant underwent standard load testing prior to shipment.
Along with chemical plants, constant spring supports are utilized in refineries, power plants, and heat recovery steam generators (HRSG). The design of the constant spring support replaced a system of pipe support called a "counterweight" design still used in some facilities today. The counter-weight system utilized pipe clamps or lugs (attached or welded to the pipe), cables, pulleys, and a set of weights. Just like the old-fashioned brass weighing scales, weights were added to one end of the pulley system until an equilibrium was reached. The counterweight design needed a large amount of space with which to operate. Constant spring hangers replaced this system because they require much less space in order to function (similar to some designs we stand on to weigh ourselves). No matter the application, our team of experienced engineers and designers can help to resolve your pipe support needs. Please contact us via our 24×7 emergency service or send an email to info@pipingtech.com.
PT&P REF. ORIGINAL POST 08232016
Compact Springs Designed for an Oil Refinery Expansion Project
Type:
Compact Spring Supports (Disc Springs)
Material:
Carbon Steel | PTFE, 25% Glass-Filled
Design:
Movement: 1/32″ to 1/4″ | Load: 12,000 lb.
Testing:
Standard Spring Rate & Calibration Tests
These compact spring supports were custom designed for an oil refinery expansion project. They will be installed underneath a heat exchanger supporting a load of up to 12,000 lb. The space available was limited to 3" for the installed height, and the movements ranged from 1/32" to 1/4". These units are the perfect solution for tight spaces where the distance between the supporting steel and the equipment/pipeline is extremely limited. These compact springs are fabricated from carbon steel and utilize engineered Belleville (disc spring) washers to achieve the desired spring rate. 25% glass-filled (PTFE) slide plates are bonded to the top of the load flange and provide a low coefficient of friction in order to adjust the spring’s height.
Here at Piping Technology and Products, we manufacture a wide range of variable spring supports along with constant spring supports. Our experience and know-how have helped to facilitate designs to incorporate site conditions where no conventional support is available.
PT&P REF. ORIGINAL POST 03092017
Custom All Stainless Steel Variable Spring Supports for a Floating LNG Platform in Singapore
Type:
Variable Spring Supports
Material:
Alloy 2205 Duplex/SAE 5160H
Design:
Operating Load up to 3,597 lbs./Operating Temperatures of -15-200°F
Testing:
Standard Load & Travel Tests
PT&P manufactured these custom variable spring supports for a floating LNG platform in Singapore. The spring housings are fabricated with alloy 2205 duplex, and the coil is manufactured from – SAE 5160H to help prevent corrosion due to sea salt. The variables installed heights range from 10-3/4″ to 12-1/16″ and are designed for an operating load of up to 3,597 lbs. Also, load tests were performed at operating temperatures of -15°F, along with liquid penetrant testing of the welds. These variable springs are also designed to suit a highly corrosive environment such as sea salt. They can operate in temperatures ranging from -14 to 200°F without compromising their load-carrying capacity. We offer a full range of pipe supports and expansion joints for offshore applications, including floating platforms for cryogenic systems for offshore LNG transfer, both for ship-to-ship and ship-to-shore. Our team of engineers and field service technicians have assisted in offshore diving examinations to both inspect and recommend solutions to help solve emergency needs.
As the floating LNG market continues to grow at a rate of almost 5% year over year, it is evident the increased demand for clean energy is the driving factor. Piping Technology and Products and its subsidiaries are well-positioned to support the global pivot to renewable and clean energy needs. In the last year alone, we designed and delivered products and services in most associated sectors, including solar, wind, water, geothermal, bioenergy, nuclear, hydrogen & fuel cell sectors worldwide.
PT&P REF. ORIGINAL POST 01022018
Variable Spring Supports Designed for a Furnace in Trinidad
PT&P designed and manufactured these F-Type variable spring supports for use in a furnace at a facility in Trinidad. We manufactured these furnace springs for an operating load of 398 lb., a movement up to 1/2″, and a spring rate of 84 lb./in. Customer specifications required a modified “installed height” while maintaining the spring rate, operating load and installation load. In order to accomplish this, PT&P designed, manufactured, and attached, to each spring, a “pedestal” to accomplish the increased installed height. They are fabricated from carbon steel with a red oxide primer coating (instead of a hot dipped galvanized) to protect against corrosion. Our standard hot-dipped galvanizing is not suitable for high temperatures because the zinc used in the galvanizing process can melt and cause damage to surrounding pipes and equipment. We also offer several other coatings for high-temperature applications.
We offer a wide range of modifications to our standard variable springs, from stainless steel units used in Food Processing plants and facilities which operate at Sub-Zero temperatures to units designed for use in high-temperature applications often found in refineries, fertilizer, and chemical plants. Some applications include hydrogen reboilers and radiant coils in gas vent heater systems. Our team of sales, engineering, and manufacturing offers a unique source of experience and knowledge unmatched in our industry.
In a Furnace application, both variable and/or constant spring hangers are utilized to support piping and equipment. In the past year, we have provided constant furnace springs for some of the largest refineries in the Americas. We replaced a 25-year incumbent design with a smaller envelope at a lower cost than any other offering in the market with our newly designed nano-constant. The project requirements were stringent in terms of load deviation requirements of 3% of all catalyst tube springs. We provided over 350 furnace springs in less than six months’ time from our manufacturing facility in Houston, Texas. To expedite the manufacture and shipment of springs, we built a new test machine in order to conduct tests more quickly, as every unit is tested before being shipped to the job site.
If you need assistance or are interested in scheduling a virtual or in-person training specifically on pipe supports and expansion joints for furnace applications, reach out as we are always available 24×7 via our emergency service or just send an email to info@pipingtech.com.
PT&P REF. ORIGINAL POST 02212017
Compact Spring Supports Designed for an Oil Refinery in Minnesota
These compact spring supports were custom designed for an oil refinery in Minnesota. Typically, compact spring supports are used to support large loads but small movements relieving process equipment nozzles from overloading. In this case, the springs are designed to support loads of 5,605 lb., 4,747 lb. and 1,250 lb. and movements of 0.133” and 0.029” upward and 0.199″ downward, respectfully.
Compact spring supports utilize engineered Belleville (disc spring) washers. Since these spring supports contain disc springs, both the support housings and the springs contained in the housings are made from 304 stainless steel. Corrosion resistance is significantly increased by using this combination. Glass coatings can also be applied to both the housing and springs to make the support system virtually impervious. Each assembly underwent load testing prior to shipment.
PT&P REF. ORIGINAL POST 04122016
Constant Assemblies Custom-Designed for Hot Service at a Leading Plastic Manufacturing Plant in North Carolina
Load Range: 2,280 lb. to 7,143 lb. | 2″ Total Travel
Testing:
Q.C. Inspection | Load and Travel Tests
PT&P custom-designed Constant Spring Support with travel stop adjustment rods for a manufacturing company. We “re-created” the design of constants sold years ago by our now sister company, Fronek Anchor/Darling. The constants needed to fit the “envelope” or space of the original constants sold to this client for an application in an existing plant. The constants were fabricated from A36 carbon steel, hot-dipped galvanized, and painted with an epoxy coating. The assemblies are designed for an operating load ranging from 2,280 lb. to 7,143 lb. with 2″ of total travel. Standard load and travel test and Q.C. inspections were completed prior to shipment to North Carolina.
We have a great deal of experience manufacturing constant spring supports similar to that of existing constants if needed to fit existing space limitations. We can also refurbish constants manufactured by competitors if the units are repairable. So whether the constants are for large duct systems in power and refining plants or focused around renewable, carbon-neutral plants, we can assist our clients to find a cost-effective solution.
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