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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

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Saddle Support Spring Isolators for an Old Steam Chest Saddle
November 21, 2023

Saddle Support Spring Isolators Designed 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. Ptp Spring Isolators Plain Diagram 161917

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

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36” Dia. Cryogenic Pipe Saddles Designed for an LNG Facility
November 14, 2023

36” Dia. Cryogenic Pipe Saddles Designed For A Lng Facility

36” Dia. Cryogenic Pipe Saddles Designed for an LNG Facility

PT&P custom-designed pipe saddles with micarta base insulation for an LNG facility in Australia. The saddles were fabricated from 304L stainless steel plates with thickness ranging from 1/8″ to 3/8″. The micarta blocks range in thickness from 1/4″-3″. The saddles were designed to support pipes up to 36″ in diameter at an operating temperature of -300°F. Standard Q.C. and dimensional tests were performed prior to shipment.

A pipe saddle is any pipe support that cradles a pipe and transfers the pipe’s load weight onto a supporting base. Much like a saddle on a horse supports a rider and keeps them from bouncing on the animal, pipe saddles support a pipe’s weight. Pipe saddles are commonly used on large-diameter piping where the load is exceptionally heavy or when contraction-expansion movement is expected. Pipe saddles are welded to the pipe and are used in conjunction with roller supports or on-beam supports.

With the current uptick in global LNG demand driving US-based LNG production, Piping Technology and its subsidiaries are well-positioned to support large-scale projects in a timely manner. Our engineering and production teams work closely with our clients to ensure site, operator, and design needs are met. LNG demand is positioned to continue to grow over 60% by 2035.

PT&P REF. ORIGINAL POST 10232015

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