These big ton spring supports were custom designed for an LNG plant in Australia. These units were designed with PTFE, 25% glass filled slide plates, and will be used under the saddle supports of a horizontal pressure vessel. The big tons were selected due to a combination of confined space, heavy loads, and thermal expansion. The units measure 28-3/8″ x 25-3/8″ x 13” and are capable of supporting a load up to 11,488 lb while accommodating a down travel of 0.31 inches.Read More
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.Read More
PT&P designed and manufactured these variable spring hanger assemblies for an upstream and valve project in Thailand. The variables clamp sizes range from 6″ to 12″ diameter with installed heights ranging from 6-8/8″ to 12-1/4″ from the structure to the center of the pipe. The B-Type pipe hanger assembly uses coil springs to support the load and allow for some movement. They are furnished with one lug welded to the top of the spring casing which allows the assembly to be suspended from structural members for pipe support. All forty-seven variable spring supports were quality checked with a 100% spring coil deflection test and a load cell calibration to set the assemblies at the prescribed installed load.Read More
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Variable Spring Support Design, Size Selection, Installation & Maintenance Webinar
This Webinar will focus on the different types of variable spring supports and big ton variable spring supports. Learn about the special features available, in addition to the design of a variable support. View how the different coil configurations produce a unique response to an applied load and see how a spring assembly is loaded. Discover the basic steps in selecting a hanger design and the step by step process used to size a spring for your application. Learn about the different attachments, testing, and installation and maintenance procedures. View examples of failed supports provided by our Field Service Division and learn why they failed and how to prevent it. Gain knowledge of the valuable tips used when deciding to replace or re-calibrate a variable spring support, as well as adjustments, shutdown and isolation procedures.
These big ton variable spring assemblies were custom designed for an LNG plant in Western Australia. They are specially designed with PTFE, 25% glass filled slide plates, and will be used under horizontal pressure vessel saddle supports. The big tons were selected due to a combination of heavy loads and thermal expansion. The units measure 30″ x 30″ and are capable of supporting a load up to 95,000 lb. with down travel of 2 to 5mm vertical.Read More
PT&P designed these G-Type variable spring support assemblies for an LNG facility in Saudi Arabia. The variables are comprised of two standard spring housing joined together with an intermediate bridge assembly. They are designed for an upwards travel range of 0.078″ to 0.118″. The variables were fabricated from carbon steel with a hot-dipped galvanized finish. Standard load and travel testing was completed prior to shipment.Read More
These compact spring supports were custom designed and built within 4 weeks to support a pump for a facility in Wyoming. The housing was fabricated from A-36 carbon steel and hot-dipped galvanized to protect them against corrosion. The disc springs are engineered using the stainless steel Belleville disc springs designed for large loads but small movements. In this case, the springs are designed to support a load of 11,137 lb. and movement of 0.018″ (upward). Each assembly underwent load testing prior to shipment.
The compact size and resistance to corrosion attributes of these compact spring supports make them ideal for placement under the discharge piping of a pump at this facility. By using these compact spring supports directly on the pump, excessive thermal loading on the pump’s discharge nozzle is resolved and brings it within the pump manufacturer’s allowable limit, so the pump will operate safely, as intended which also results in extended life and low maintenance.Read More
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Live Webinars are worth 1 PDH Credit for TX Professional Engineers
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.Read More
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.Read More