Piping Technology & Products designed these B-Type variable spring supports with clevis hangers for an ethylene cracker plant in Texas. Interestingly enough, we recently supplied over 50,000 supports to one of the largest ethane cracker polymer plants in the US, which was completed last year. In addition to variables, we supplied slide bearing plates, hot and cold insulated shoes/supports, snubbers/sway braces/sway struts, pipe hanger hardware, expansion joints metal bellows, rectangular & circular spacers, davit arms, welded pipe shoes, rod hanger assembly, and wear Pads
On this client order, the variable spring supports, threaded rods, and hex nuts were fabricated from A36 carbon steel, and the clevis hangers from 304 stainless steel. The assemblies are 83-1/8″ in length, and the spring size is 6-80-B. They are designed for an operating temperature of 800°F, an operating load of 619 lb, and 0.5″ of movement. Standard load and travel tests were performed prior to shipment.
Operating Load Range: 475 lb. to 1,250 lb.
Movement of 2-1/4″ to 5″
Q.C. Inspection | Load and Travel Tests
PT&P fabricated multiple B-Type and C-Type constant spring supports for an oil refinery in Louisiana. The constants are fabricated from A36 carbon steel and hot-dipped galvanized. The dimensions range from 12” x 18” x 20” to 12” x 12” x 32”. The operating load range is 475 lb. to 1,250 lb. with movement of 2-1/4” to 5”. Standard load testing was completed to ensure quality and performance.
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.
At Piping Technology and Products, our commitment to continuous improvement has helped us to become a leader in the industry by providing the highest quality products and services.
This custom-designed insulated pipe support will be used for a high-temperature pipeline at a chemical plant in Canada. This Hot Shoe was customized without the u-base and modified with an extended length. It will be used to prevent the movement of a 6″ diameter pipe in the axial direction. Axial stops will be welded to the clamp O.D. in the field. The plates are 11-5/8″ O.D. x 48″ in length and fabricated from A36 carbon steel. The insulation is 2″ thick high-density calcium silicate and well-suited for temperatures up to 1200°F. A hot shoe is a pipe support that can be used for high-temperature applications, such as high-pressure steam lines or boiler feed water, where heat loss through the pipe support is not desirable. Insulated Hot Shoes can be designed and used for temperatures up to 1400° Fahrenheit.
An industrial furnace, also known as a direct heater or a direct-fired heater, is a device used to provide heat for an industrial process. Furnace designs vary as to their function, heating duty, type of fuel, and method of introducing combustion air. Heat is generated by an industrial furnace by mixing fuel with air or oxygen, or from electrical energy. The residual heat will exit the furnace as flue gas. Types of industrial furnaces include batch ovens, vacuum furnaces, and solar furnaces. Industrial furnaces are used in applications such as chemical reactions, cremation, oil refining, glasswork, metallurgy, mechanical engineering, chemicals, ceramic, and building materials. Industrial furnaces using fossil fuels are characterized by heat losses from flue gases with a temperature of 500°C and above.
PT&P supplies many products that are well-suited for furnace applications. The first category we’ll take a look at is Engineered Spring Supports. We size furnace springs the same way as we would for a conventional variable or constant spring support. Construction may include a welded design instead of bolted and custom nameplates with the test data and ID tag. Most furnace spring supports are coated with red oxide primer to avoid potential hazards when exposed to high temperatures.
PT&P specially designed and fabricated hundreds of altered Type A Variable Spring Hangers in order to accommodate the special travel and spring rate needed to support the furnace tubes of a hydrogen reformer in Venezuela. In order to accommodate customer-specified travel and spring rate, modified spring coils were required. With a travel of 8-7/8″, the variable spring hanger casing lengths were increased from the standard size of 32″ to over 6′ long. The calculated spring rate is 79 lb/sq in for an operating load of 2,804 lb. and an installed load of 3,505 lb. The housings are coated with heat-resistant paint, which protects the spring coils from corrosion and high temperatures in the furnace area.
Expansion Joints are not installed inside furnaces due to the extremely high temperatures of the environment and the piping system. Expansion joints will typically be found on the duct work and in the piping coming in and out of the furnace. In the last six months, we have shipped over 40% of our expansion joint jobs in less than 2 weeks to meet customer project deliverables.
Fabric Expansion Joints that are in-service near furnaces, typically include a 3-layer belt consisting of Silicone, Fiberglass, PTFE, and Mineral Wool Insulation. The configurations are either round, rectangular or square as seen in the examples below.
Furnace Bags are used to seal high-temperature tubes that penetrate the furnace floor. The furnace bag consists of multiple layers of flexible, flame and heat resistant, impervious fabric designed to operate from start-up to high-temperature design conditions. The bag will expand and contract with the varying furnace temperatures.
Stainless steel clamps or band straps connect one end of the pipe that goes through the penetration opening and the other to another sleeve in the furnace floor. A tapered steel coil is installed around the conduit inside the bag to prevent the fabric from collapsing inward during vacuum conditions. PT&P’s standard furnace seal bag is nickel reinforced, with a special coating that reduces airborne fibers and increases tensile strength.
PT&P manufactured cryogenic pipe saddles for LNG transportation pipelines. These types of insulated supports have been utilized in LNG plants around the world. Insulated supports are also used on cold piping in semiconductor plants or plants that make batteries to eliminate condensation.
A cold shoe is a pipe support used for cryogenic applications where the transfer of cold temps from the pipeline to the surrounding steel pipe rack is not desirable. These supports can be used for temperatures down to -320° Fahrenheit. This particular type of insulated pipe saddle assembly was fabricated with a carbon steel base plate, 304L stainless steel saddle, and an insulation block. The overall size ranges from 25” x 19” x 12-¾” to 29” x 25” x 13-3/8”. These pipe shoes were manufactured to support pipe sizes ranging in diameter from 36″ to 42″ NPS.
For this job, our client was a new entrant into the LNG engineering and design market space, and this was one of their capstone projects internally and for the marketplace. Given PTP’s long history and experience concerning LNG pipe supports, we served as strategic partners in the engagement. We identified that the client was using a pre-existing standard that underestimated the amount of Micarta® insulation thickness needed to provide adequate insulation for the facility.
PT&P engineers recognized that the insulation was not sufficient, and we tested the existing design using a test fixture we developed to demonstrate our concern. PT&P utilized thermal scanning (infrared technology) to measure temperature at various locations around the insulated pipe support. As a result of our tests, our client corrected the concern, saving dollars, man hours, and scheduled project completion.
Our work with facilities such as these are a great example of our commitment to providing clean, affordable energy to the world.
PT&P supplied “on-time delivery” of two industrial structural steel pipe racks and the accompanying pipe spools that would be attached to storage tanks measuring approximately 120 ft. in diameter and over 85 ft. tall. Pre-Engineered Pipe Racks attached to storage tanks are used in a wide range of industries from Waste Water Treatments plants, Community Water Storage Tanks, to Above Ground Storage Tanks used in Refineries, Natural Gas, and Petrochemical plants.
PT&P leveraged its breadth of manufacturing and engineering capabilities to reduce costs for its client in the deployment of this Pipe Rack. Our focus was to complete as much work as possible in our production facility, where costs are typically far lower than in the field. We made adjustments to the design to aid in-field deployment to minimize total overall costs. This project also leveraged our capabilities with structural steel, pipe spools, TPI, and insulation. We have all of these capabilities in-house, which made it easy to fabricate the complex structures in this project.
Each pipe rack had an overall dimension of 12 ft. wide and 113 ft. tall and was fabricated from carbon steel. Due to the overall length, each frame was fabricated in two sections in our shop in order to transport each to the job site. Additionally, each frame was provided with lifting lugs designed by PT&P to facilitate both, the transporting of each frame half-section and the subsequent vertical lift of each completed unit. Each pipe rack was fitted with 9 pipe spools ranging in diameter from 2″ to 12″ (6 were insulated pipe spools, and 3 were non-insulated pipe spools). The pipe material used to fabricate the pipe spools were SA-53, SA-106, and SA-333.
Six of the pipe spools were supplied pre-insulated. At the ends of each section of the pipe spool, there were bare sections of pipe where PT&P Field Service would later perform “tie-in welds” in the field.
After completing shop fabrication, the pipe racks were prepared to be transported to the job site location for final assembly before installation by PT&P Field Services. This consisted of bolting the two halves of the pipe rack together and completing the “tie-in welds” at each pipe spool connection. All of the “tie-in welds” were examined and verified by X-ray analysis. After completion of all the “tie-in welds”, PT&P Insulation Department installed insulation in the field on the 6 pipe spools requiring insulation at these connection points.
Each section of the pipe spool was supported from the top of the rack by a rigid rod hanger also supplied by PT&P. Rod hanger assemblies are round steel bars normally threaded and used to connect other components, such as pipe support hardware, to make a pipe hanger assembly. PT&P’s field service team installed the main pipe rack with seven pipe spools each over 86 ft. long on large storage tanks. The pipe spools were positioned on the pipe rack steel using special U-bolts to “guide” the piping.
U-bolts are u-shaped rods with threaded ends that fit around a pipe and are attached to a supporting member. These U-bolts were coated in plastic to prevent corrosion between the pipe and the U-bolt material. Additionally, Thermal Plastic Isolators (TPI) were also used to prevent corrosion between the pipe rack steel and the pipe spools. TPI can be customized in height, width, length of TPI, hole sizes, hole locations, and special shapes.
Also installed on the Insulated pipe spools were FRP wear pads that rested on the thermoplastic Isolator. FRP is also known as non-metallic wear pads, which are used for corrosion protection for uninsulated piping systems to extend the life of the pipe.
After assembly by PT&P Field Service, each complete unit was lifted vertically into position and bolted to the storage tank at the “tank connection points.” This demonstrates our ability to provide rare expertise in all facets of project management including planning, engineering design, logistics, and job site management.
We have a fully diversified operation that is customizable based on your unique needs. If you just need stock supports and standard items, we can provide them very quickly. Our engineering team can help find the best support(s) for your application. Or our field service team can inspect your pipeline conditions and recommend the best solutions. Our team also regularly completes installations and conducts on-site project management. We are your one-stop shop for pipe supports, insulated supports, expansion joints, vibration solutions, pipe stress analysis, and more.
Floor mount Support Modules utilize a 1/4" steel base plate to clamp, bolt, or weld instrument assemblies directly to a wall or beam. These Primary Modules can be used independently or together with Secondary Modules to construct a universal support package for any instrument in any position. These units were furnished with a hot-dipped galvanized finish to protect against corrosion. We can also provide other finishes such as painted or powder-coated. Instrument stands are used in almost any plant that utilizes process instrumentation such as flow meters, pressure, and temperature sensors, and other instruments used to monitor processes both onshore and offshore. PT&P also offers a complete line of adjustable instrument support components which, when combined, will create various configurations to your exact requirements or individual needs. In addition, we can also provide customized instrument supports fabricated from 304 SS or other materials according to your company’s specifications. We have supplied instrument stands for coker units, LNG, and refinery facilities. For additional information about our Instrument Support Stands, please click on the following link: PT&P Instrument Supports Catalog
In these times of supply chain considerations and challenges on major projects, we’ve consistently been the best partner to ensure timely design, production, and delivery of project needs on any scale with the largest range of products and services throughout your piping systems. Along with being a proven supplier on multi-billion dollar projects, we also work hand in hand with single-plant turnaround needs every day.
9″ Total Travel at 979°F | Operating Load 6,183 lb.
Hydro tested at 6,744 lb.
These 200 U-Type constant spring supports with slide plates were designed by PT&P for a plant in Texas. They are fabricated from A36 carbon steel with an HDG finish and are typically designed for vertical movement only. However, when there is lateral or axial movement in the piping system, slide plates can be used in conjunction with these constants. In this instance, graphite slide plates are bolted to the constant’s load flange and used with an upper slide plate manufactured from 304 stainless steel with a mirror finish. The upper slide plate can be welded to the base of a pipe shoe, trunnion, or the saddle of a pressure vessel. Each of the constant spring dimensions are 35-7/16″ in height and 75-3/4″ in length. They are designed for a piping system with 9″ of total travel at 979°F and an operating load of 6,183 lb. Each of these units were load tested to meet the hydro test load of 6,744 lb. before shipment.
Products such as these are used in many different kinds of plants all over the world including refineries, renewable diesel plants, chemical plants for operations such as propane/propylene splitter units, and power plants. We have the ability to custom design and manufacture constants for specific loads and various environmental conditions. A point to note, we provided similar constant spring supports supporting loads over 150,000 lb. for crude oil processing at one of the largest refineries in the world just last year (view this project). 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. Constants use a spring coil (or series 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 load and the supported load will remain uniform throughout the deflection cycle. Learn more about constant spring supports
Operating Loads: 9,320 lb. to 28,2000 lb.
Spring Rates 4,700 lb./in. & 5,320 lb./in
| Hot-dipped Galvanized Carbon Steel
Load & Travel Test | Q.C. Inspection
These variables were supplied to an overseas LNG facility where accessibility is limited due to the remote location in the facility as well as the plant itself. Products shipped must be very dependable and long-lasting because of the difficulty of shipping to this location. Variables use coiled springs to support a load and allow movement. The resistance of the coil to a load change during compression, which is why these devices are called “variables”. We offer a variety of different designs of variable spring pipe supports. PT&P with its long-standing history and experience has set up optimized manufacturing to offer an unparalleled set of customization options with minimal impact on delivery timeframes to support JIT deliveries and help manage cash flows on such large capital-intensive projects. In addition to our standard (hot-dipped galvanized, neoprene coated spring coils) variable spring supports, we can customize our springs to accommodate special materials, finish, dimension, load, load adjustment, travel, and travel stops, as well as provide sensors for remote monitoring.
Given the shift in global LNG production due to volatile political situations outside the US, the US has become the largest exporter of LNG this year globally. US LNG exports will continue to grow because of increased LNG export capacity, increased international natural gas and LNG prices, and increased global demand, especially in Europe.
During the initial build out in LNG globally in the late 1990s/early 2000s, PTP provided the platform to its customers and their clients for extensive innovation concerning all phases of development concerning pipe supports for LNG plants and terminals starting with product design, testing, material, and climate considerations. As the “thought leaders” in product design, we helped develop and produce the now most commonly used cryogenic supports utilizing G-10 insulation. As LNG capital projects return to the US, you can count on PTP to provide an unparalleled track record and expertise to move your LNG projects along safely in a timely cost-effective manner to meet world energy needs.