Function of a Constant Spring
April 29, 2018
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Read MoreTrunnions with Micarta ® G-10 Designed for a Cryogenic Pipeline
| Type: | Trunnions for Cryogenic Temperatures |
| Size: | 8″-24″ Dia. | 12″-18″ L | 6″-15″ W | 6″-40″ H |
| Material: | Micarta® G-10 Insulation | CS | SS |
| Design: | Cryogenic Temperatures of -320°F |
| Testing: | MTR’s | Non Destriuctive (PMI) | Q.C. |
PT&P custom designed trunnions for a cryogenic pipeline at an LNG facility in Australia. The insulated supports were fabricated with carbon steel base plates, 304L stainless steel plates and fasteners. To prevent cryogenic temperatures of -320°F from transferring to the base of the trunnion support, Micarta® G-10 was used as insulator. The trunnions were designed to support pipe sizes from 8”-24” with dimensions ranging from 12”-18” in length, 6”-15” in width and 6”-40” in height. MTR’s were provided, and non-destructive testing (PMI) was preformed, along with standard Q.C. inspection prior to shipment.
This type of support is available in pipe sizes between 1/2″ to 42″ NPS; however, PT&P can customize any size needed. The standard material for these supports are galvanized or hot-dipped galvanized carbon steel. These supports were customized with Micarta® instead of the standard high density polyurethane with vapor barrier. When ordering, specify pipe size, insulation thickness and length. See more on Figure CS-6030 from our cryogenic pipe supports section.
- Learn more about the History of Insulated Pipe Supports
- View the original insulated support designs
- View our Pipe Shields division models
- Contact us for more assistance
Piping Technology & Products and Pipe Shields have been a major international supplier of pipe shoes and pre-insulated supports for more than 10 years. Our cryogenic pipe supports comply with the following standards ANSI / ASME B31.1 & B31.3 and The Manufacturers Standardization Society SP-58, 69, & 89.
Read MoreCryogenic Pipe Supports with Micarta® G-10 for an LNG Facility in Australia
April 16, 2018
| Type: | Cryogenic Pipe Supports |
| Size: | Pipe Size of 1” to 36” |
| Material: | LTCS Material Tops, Stainless Steel, & Micarta® G-10 Insulation |
| Design: | -50°F |
| Testing: | PMI |
Piping Technology and Products supplied cryogenic pipe supports with axial stops for an LNG facility in Australia. The cold shoes were fabricated utilizing low temperature carbon steel, stainless steel and Micarta® G-10 insulation blocks. We supplied a wide range of lengths and pipe sizes from 1” to 36”. The cryogenic temperatures are low as -50°F. A special paint system was used for the low temperature carbon steel components to resist rust. PMI testing was performed on the stainless parts. Delivery was within 4-6 weeks.
Read MoreHigh Temperature Pre-Insulated Pipe Supports with Slide Plates for an Ethylene Production Plant in Texas
March 27, 2018
| Type: | High Temperature Pre-Insulated Pipe Supports with Slide Plates |
| Size: | 15″ Long | 23″ Wide | 4.5″ Insulation |
| Material: | Calcium Silicate, Firetemp®, Carbon Steel with HDG, UHMW Polyethylene |
| Design: | 750°F, 1,325 lb Operating Load, & 12″ Pipe Size |
| Testing: | Standard Quality Control |
PT&P custom designed these pre-insulated pipe supports for high temperatures at an ethylene production facility in Texas. The hot shoes are 15″ long and 23″ wide with 4.5″ thick insulation. The insulation is comprised of calcium silicate and Firetemp®. The hot shoes were fabricated from carbon steel with a hot-dipped galvanized finish and the slide plates from UHMW Polyethylene. They are designed as a 2-way guide than can support loads in two directions. They are designed for a pipe size of 12″ in diameter with an operating temperature above 750°F and on operating load of 1,325 lb. Standard quality control tests were performed with a 4-week turn-around time.
Read MoreField Service Inspection on Constant Spring Supports after 30 Years of Service on an Offshore Platform
March 12, 2018
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The use of zinc and galvanizing has a long history. The early patents for hot-dip galvanizing were issued in France and England in 1836 and 1837. This technology was quickly adopted and was widely used in the late-1800s.
In the United States, we have bridges more than 100 years old which have galvanized structures. In addition, we have transmission towers and substation structures that are over 70 years old. A pipe rack at a petrochemical plant near Houston was studied after 28 years of service. Measurements of the zinc thickness remaining provided a forecast of another 60 years of service.
Any coating which provides a barrier to the moisture and oxygen in the air will help protect carbon steel from corrosion. A properly painted surface will provide a barrier, but it is subject to scratching from contact with hard objects.
Constant Spring Support Inspection:
Visually inspect each Constant hanger:
Search for signs of visual cracks, fractures, and corrosion of the spring casing and the following:
(1) beam attachment
(2) pin
(3) constant hanger attachment
(4) pipe clamp attachment
(5) weldless eye nut
(6) threaded rod
(9) spring coil
(10) Check if travel stops are removed
Check (7) turnbuckle (if present), locknuts (8) and other threaded items to ensure they are secured and fastened
Compare the position of the (10) coil with the hot/cold load indicator and operating range of the spring
Check the mobility of the (11) load column
Replacement Criteria:
– Signs of excessive corrosion or fatigue
– Rust damage of entire unit
– Modifications to operating conditions
– Consider condition of components (cam mechanisms, bearings, etc.)
Our field service team is available 24×7 for your quick-turn, emergency needs.
Call Field Service: +1-713-992-7048
Read MoreHydraulic Snubbers Designed for a Steam Generator in Mexico
February 26, 2018
| Type: | Hydraulic Snubbers |
| Size: | 24″ up to 30″ Pin-To-Pin | Cylinder Dia. 1.5″ to 3.25″ |
| Material: | Carbon Steel |
| Design: | 3,000 lb. to 20,000 lb., with a 6″ Stroke |
| Testing: | Standard Quality Control |
PT&P designed Fig. 510 AD short strut hydraulic snubbers for a steam generator at a facility in Mexico. The snubbers ranged in length from 24″ up to 30″ pin-to-pin with cylinder diameters of 1.5″ to 3.25″. A total of 48 snubbers were fabricated from carbon steel and designed for an operating load ranging from 3,000 lb. to 20,000 lb., with a 6″ stroke. Snubbers are used for systems where unrestrained thermal movement must be allowed except during cyclic disturbance. Hydraulic snubbers are designed to protect the piping system when a sudden, heavy load is applied (such as an earthquake of high intensity), which can cause serious vibrations leading to damage and possible failure of the piping system.
Read MorePre-Insulated Cryogenic Supports for Propylene Dehydrogenation
February 12, 2018
| Type: | Pre-Insulated Cryogenic Supports |
| Size: | 12” Long Base | 32” Wide Base | 62″ Overall Height | 18” Long Insulation |
| Material: | Polyurethane | Carbon Steel w/ HDG Finish |
| Design: | Operating Temperature -360°F & 42″ NPS |
| Testing: | Standard Quality Control |
Piping Technology and Products, Inc. and custom designed two pre-insulated cryogenic supports for a propylene dehydrogenation application at a petrochemical plant in Texas. The insulation is made from a high density polyurethane insulation, with the bearing plates and side bumpers fabricated from carbon steel with an HDG finish. The shoes are capable of insulating and supporting at temperatures as low as -360°F. These were designed to support pipeline diameter of 42” with overall height of 62” diameter. Regular quality control tests were performed with a standard turn-around time.
Read MoreC-Type Constant Springs Designed for a Chemical Plant in Italy
January 29, 2018
| Type: | Constant Spring Supports |
| Size: | 14″ x 19″ x 64″ |
| Material: | A36 Carbon Steel |
| Design: | 2 1/2” to 5” Total Travel and 7,681 lb. Load |
| Testing: | Standard Load and Travel Tests |
PT&P custom designed and manufactured C-Type constant spring supports for a chemical plant in Italy. The constants were designed for travel from 2 1/2” to 5” and are specified to carry a load of 7,681 lb. They are fabricated from A36 carbon steel and have a physical size of 14″ x 19″ x 64″. The supports were designed for max deviation of 6%. The standard load adjustment is 10%. However, this unit was designed with capability of up to 20%, while the standard load deviation is 4%. This constant was custom designed to allow for single pin connection with negligible constant frame at the pin connection. A multi-position locking device was installed, and standard load and travel tests were performed to ensure quality and precise performance.
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