Tag: Constant Springs

Constant Spring Support Assemblies Designed for a Chemical Plant in New Jersey

April 16, 2024

Constant Spring Support Assemblies Designed For A Chemical Plant In New Jersey

Type: Constant Spring Supports
Size: PTP 200 C-Type Double Suspension
Material: Hot-dipped Galvanized Carbon Steel | Epoxy Coated Springs
Load: 8,000 lb. – 19,000 lb. | Upward Movement: 6″ – 9″
Testing: Standard Load and Travel Test

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

U-Type Constant Spring Supports Designed for a Power Plant

January 2, 2024

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

Constant Spring Supports Custom-Designed for a Large Crude Oil Processing Facility

November 28, 2023

Constant Spring Supports Custom-Designed For One Of The Largest Crude Oil Processing Facilities In The World

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

U-Type Constants Designed with Slide Plates for a Polypropylene Plant in Texas

July 4, 2023

147164A1

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

Constant Spring Supports Custom Designed for a Power Plant in Egypt

April 18, 2023

Constant Spring Supports Custom Designed For A Main Stream System At A Power Plant In Egypt

Type: Constant Springs & Alloy Clamp Assemblies
Size: 48″ H x 57″ L x 24″ W | 36″ dia. Clamp
Materials: Carbon Steel with HDG Finish | Alloy
Design: 1070°F | 7-1/2″ Total Travel | 24,712 lb. Load
Testing: Load and Travel Test

PT&P custom-designed and manufactured constant spring supports for a mainstream system at a power plant in Egypt. The constants include alloy clamps designed for a 900 mm (approximately 36″ dia.) pipe. They are 48″ H x 57″ L x 24″ W with 7-1/2″ total travel from the cold position. We also supplied alloy clamps designed for an operating temperature of 1070°F. The constants are fabricated from A36 carbon steel and include a hot-dip galvanized protective coating. They are designed for an operating load of 24,712 lb. The constants have been modified to accommodate a specialized spring coil and modified casing in order to fit the existing space or envelope. Standard travel and load tests were performed prior to shipping.

Constants can be used with rollers, travelers, or slide plates to accommodate lateral or axial movement in the pipeline system in plants such as solar, geothermal, soybean crushing, ethanol, and other green energy facilities. Our company and its subsidiaries work with over 90% of the leading green energy providers in the world.

Our Field Service team, along with our pipe support engineers and designers, can also conduct inspections of existing supports, provide consultation on-site remediation, and oversee installation on both a short-term and long-term basis catering to facilities worldwide. So whether a “grassroots project” or an existing plant that has been in service for years, we offer cost-effective products and services.

PT&P REF. ORIGINAL POST 10092018

Custom Designed Constant Spring Supports for a Chemical Plant in Singapore

August 23, 2022

Custom Designed Constant Spring Supports For A Chemical Plant In Singapore

Type: Constant Spring Supports
Size: 15-¼” W x 17″ H x 46″ L with 9-¼” OD
Material: Carbon Steel | Hot-dipped Galvanized
Design: 2,379 lb. Load | 10″ Upward Movement

PT&P custom designed and manufactured constant spring supports for a chemical plant in Singapore. The constants are fabricated from A36 carbon steel and include alloy coil springs. The dimensions are 15-¼” W x 17″ H x 46″ L with 9-¼” OD. They were designed for an operating load of 2,379 lb. and movement of 10” upward and were specially designed to incorporate “telescoping spring coil housings ” and painted to protect against corrosion. Standard load and travel tests were performed prior to shipment. As part of the standard quality control process, we test every constant that we build before it is shipped. We are ISO-9001:2015 Certified by DNV GL. Last year we built over 1500 constants alone for our customers. Some were designed to support loads up to 150,000lbs with movements over 48 inches.

These specific constants were for a plant that manufactures industrial gasses such as hydrogen, carbon monoxide, and synthesis gasses. Constant spring assemblies are used in a variety of applications ranging from CDU (crude distillation units), hydrocracking units, RFCC (residual fluid catalytic cracking), naphtha hydrotreater and hydrodesulfurization units (also known as alkylation units), and sulphuric acid regeneration (SAR) units in refineries, LNG, Geothermal, Coker units, HRSG units, and other facilities where there is substantial thermal growth in the piping. They can be configured to accommodate horizontal or vertical movement.

Constants use a spring coil (or set of coils) to accommodate pipe movement from the initial (installed) condition to the final (operating) condition of the piping system. For all constant spring supports there is no difference in the load to be supported. Instead, these spring supports are designed to accommodate movement due to thermal expansion or contraction. PT&P has set up its manufacturing department to offer an unparalleled set of customization options with minimal impact on delivery timeframes. In addition to our standard (hot-dipped galvanized, neoprene coated spring coils) variable spring supports, we can customize any material, finish, dimension, load, load adjustment, travel, travel stops, and provide sensors for remote monitoring.

PT&P REF. ORIGINAL POST 12112018

Constant Supports Designed with Bronzphite® Slide Plates for Oil Refinery in China

April 4, 2022

These big-ton constant spring supports with Bronzphite® slide plates were designed for a 400 KTA light oil processing and utilization unit in Southeast Asia. The constants are designed for high loads and utilize self-lubricating bearing plates consisting of high-quality bronze and graphite-filled grooves. Bronzphite® can be used where temperatures are up to 1100°F and for high loads, low-velocity applications, and in places where the use of oil or grease is undesirable or unfeasible.

Big Ton Constant Supports Designed With Bronzphite® Slide Plates For Oil Refinery In China

PT&P custom-designed and manufactured a total of four big ton constant spring supports w/ Brozphite® slide plates for a 400 KTA light oil for a processing and utilization unit at one of the largest of largest oil refineries in China. In US refineries, crude oil still makes up a majority of what is produced today: Us Energy Info Admin Petroleum Supply

These constant assemblies were fabricated from carbon steel and hot-dipped galvanized for extra protection against corrosion. The bronze plate acts as the bearing surface, supporting heavy loads, while the graphite inserts provide a solid, oil-free sliding surface. They are designed for operating temperatures up to 1100°F and an operating load of 187,393 lb., with 1-1/2″ total travel.  It is through the combination of high-strength bearings and impregnated graphite that it is an ideal environment for maintaining excellent wear resistance and durability under severe operating conditions.  Load and travel testing was performed prior to shipment.

Bronzphite Slide Plate

For this particular crude oil production and mining facility, we also supplied other key products from our portfolio, including variables, snubbers, sway braces, and sway struts. 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.

As an industry leader in the oil, gas, and petrochemical industries for over 47 years, we specialize in designing pipe supports, expansion joints, and insulated supports for unique applications involving both products readily available and products not readily available. Our products are used in the CDU (crude distillation units), hydrocracking units, RFCC (residual fluid catalytic cracking), naphtha hydrotreater, hydrodesulfurization units (also known as alkylation units), and sulphuric acid regeneration (SAR) units in refineries.

 

PT&P REF. ORIGINAL POST 09252017

U-Type Constant Spring Supports with Stainless Steel Slide Plates

September 30, 2020

 U-Type Constant Spring Supports With Stainless Steel Slide Plates

PT&P custom-designed U-type constant spring supports for an oil refinery in Texas. Constants can be utilized in refineries within blocks such as hydrogenation units, naphtha desulfurization units, and fluid catalytic crackers. The spring’s frame is manufactured from A36 carbon steel and hot-dipped galvanized to protect against corrosion. For instances where there was axial and lateral movement, 240 Gr. 304 slide plates were installed on the load flanges of the constants. The constants supplied are designed for an operating load ranging from 1,085 lb. up to 17,480 lb. and horizontal travel from 2.5” to 6”. The overall dimensions range in size from 17” H x 20” W x 31” L to 28” H x 26” W x 66” L. Load and travel tests per industry standards were performed prior to shipment.

Constant Spring Supports Designed for LNG Service in Louisiana

July 7, 2020

Constant Spring Supports Designed For Lng Service In Louisiana

Type: B-Type Constant Spring Supports
Size: 11-5/8 W x 41” L x 19” H to 21” W x 88” L x 38” H
Material: A36 Carbon Steel | Hot-dipped Galvanized
Design: Operating Load Range: 3,170 lb. to 48,400 lb.
Movement of 3” to 8”
Testing: Q.C. Inspection | Load and Travel Tests

PT&P manufactured B-type constant spring supports for LNG service in Louisiana. These constants are fabricated from A36 carbon steel with alloy steel 5160 spring coils. The constants are designed for an operating load range of 3,170 lb. to 48,400 lb., and movements from 3” to 8”. They range in size from 11-5/8 W x 41” L x 19” H to 21” W x 88” L x 38” H. To avoid delivery delay, a standard frame was paired with an oversized coil and coil housing. The lugs were rotated 90 degrees from the standard to allow the hanger to swing beyond +/- 4” of side-to-side swing. Standard load and travel tests were performed prior to shipment.

F-Type Constant Spring Supports Designed and Manufactured for Gas Plant

April 20, 2020

F-Type Constant Spring Supports Designed And Manufactured For Gas Plant

Type: F-Type Constant Spring Supports
Size: 36″- 87″ Length | 24″ Height
Material: A36 Carbon Steel | HDG | SS Slide Plates
Design: 13,500 lb. Load | 250°F | 17.5″ Travel
Testing: Q.C. Inspection | Load and Travel Tests

PT&P custom-designed multiple horizontal F-Type constant spring supports for a gas plant in Saudi, Arabia. The constants are provided with stainless steel slide plates and custom-designed for 17.5” total travel. They are fabricated from carbon steel, hot-dipped galvanized and painted to withstand a highly corrosive environment. The assemblies are 24” in height, 36” – 87” in length, designed for an operating temperature of 250°F and loads up to 13,500 lb. Load tests and dye penetrant testing was conducted prior to shipment.

Constant Spring Supports Designed for up to 9-1/2” of Travel

November 18, 2019

 

Constant Spring Supports Designed For Up To 9-1/2” Of Travel

Type: Constant Spring Supports
Size: 29″ L x 14″ W x 18-3/4″ H |  76″ L x 26″ W x 37-3/8″ H
Material: A36 Carbon Steel | HDG | Neoprene
Design: 124 lb. to 10,570 lb. Load | 3-1/2″ to 9-1/2″ Travel
Testing: Q.C. Inspection | Load and Travel Tests

PT&P designed and manufactured U-Type and D-Type constant spring supports for a facility in Mexico. The constants frames are fabricated from A36 carbon steel and have a hot-dipped galvanized coating. The spring coils are alloy steel and have a neoprene coating. The dimensions range from 29” L x 14” W x 18-3/4” H to a max of 76” L x 26” W x 37-3/8” H. The 200-U-Type constants were supplied with graphite plates on the load table. The supports range in load from 124 lb. to 10,570 lb. The total travel ranged from 3-1/2” to 9-1/2”. Standard Q.C., load and travel tests were performed.

Function of a Constant Spring

April 29, 2018

Image

Constant Spring Supports Designed for a Power Plant in New Mexico

March 7, 2016

Constant Spring Supports Designed For A Power Plant In New Mexico

PT&P fabricated constant support assemblies for a power plant in New Mexico. The constant assemblies will be used in conjunction with structural supports also provided by PT&P. Operating loads range between 7,000 lb. and 20,000 lb. and designed for movements from 10-1/2″ to 12″. All thread rods were coated with rust prevention compound and the constants were painted with Intergard® 475 HSS. The travel stops are wired to the constants frame and can be reused to lock the constant, preventing travel during plant maintenance or shutdowns. Standard load and travel tests were completed according to MSS standards prior to shipment.

Register for the next Webinar: Engineered Spring Supports (Practical, Hands-on Approach)

November 12, 2015

This webinar is over… view the recording at: https://pipingtech.com/resources/media/webinars/

Live Webinars are worth 1 PDH Credit for TX Professional Engineers

Engineered Spring Supports

Learn how the theoretical applications of spring supports are put into use in the real world. We will start with a review of the working principles of both variable and constant springs. See how brand new spring looks at delivery, and review installation guidelines. Learn the key points to review through the total installation process and subsequently when the springs are in operation. See how to determine if springs need adjustments, re-calibration, refurbishment or replacement. View in field examples, shutdown and isolation procedures. See the selection process required when there are significant changes to the operating condition.

The featured presenter, Jerry Godina has over 16 years experience as a pipe support designer and manages PT&P’s engineer training development program. He also inspects existing supports, consults on site remediation projects and oversees installation on a regular basis.

Custom F-Type Constant Spring Supports for Oil Refinery

November 6, 2015

Custom Constant Spring Supports For Oil Refinery

PT&P designed 100-F type constant spring supports for an oil refinery in Alabama. These custom constant spring supports are 32” x 12” x 23.5” and designed to support an operating load of 650 lb. with 14” of total travel. The constants are fabricated from A36 carbon steel and the coil is from 5160H alloy material. Standard load and travel testing were completed to ensure the quality and performance of these constants.

Constant Spring Supports Designed for a Steam Methane Reformer

May 10, 2015

Constant Spring Supports Designed For A Steam Methane Reformer
PT&P manufactured Fig. PTP 100-E constant spring supports for a steam methane reformer plant project in Thailand. The constant springs are designed for a pipe operating temperature from 650°F to 1250°F and an operating load of 3,355 lb. with a movement of 13″ upward. The constants are fabricated from carbon steel and painted with an epoxy for high temperatures. Standard load and travel test were completed prior to shipment.

Custom Vertical Constant Hangers

April 6, 2010
Custom Vertical Constant Hangers
Custom Vertical Constant Hangers

PT&P manufactured constant spring supports to custom dimensions of 21″ height x 13″ width x 7.5″ depth. The total travel is 7″, with an actual travel of 3.5″ in both up and down directions. The rated load is 180 lb. and they will be used to support pipe lines for a power plant in Louisiana.

Do you see a need for constant hangers in your plant? Get pricing today!
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78″ Long 200 C-Type Constant Spring Assembly for a Power Plant

January 12, 2010
78&Quot; Long 200 C-Type Constant Spring Assembly
78&Quot; Long 200 C-Type Constant Spring Assembly
78" Long 200 C-Type Constant Spring Assembly

Each constant spring support is designed to carry a 27,200 lb. load and provide 13″ downward travel. Special spring coils are used in order to reduce the entire length of the pipe hanger assembly. The frame and all internal moving components’ geometry are optimized as well to reduce the overall size. In total, the frame and casing combination measure 78″L x 21½”W x 33¾”H. The customer requested frame modification for special lug locations.

Do you require constant spring assemblies for your plant? Get pricing today!
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80" U-Type Constants for a Power Plant

October 10, 2007
80&Quot; U-Type Constants For A Power Plant
80" U-Type Constants for a Power Plant

– U-Type constant spring supports for a power plant in Thailand
– Fabricated from A36 carbon steel
– Dimensions = 25″W x 28″H x 80″L
– Load = 24,000 lb.
– 3″ of total travel upward
– Standard load and travel testing was performed

Want to learn more about constant springs? Instantly view a constant webinar today.


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U-Type Constants for an Oil Refinery in Taiwan

May 10, 2006

 

U-Type Constants For An Oil Refinery In Taiwan
U-Type Constants for an Oil Refinery in Taiwan
U-Type Constants For An Oil Refinery In Taiwan
Constants in Assembly

These Figure 200 U-Type horizontal upthrust constants are designed to support piping from below. They are fabricated from carbon steel. These constants were also hot dipped galvanized and then specially painted. In addition, they are able to handle loads of up to 13,600 lbs. Each constant has a capacity of 4 total travel. They range from 55 to 62 long. Load testing and external inspections were completed to ensure the quality of these constants.

Want to learn more about constants? View a constant spring webinar today!


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