![]() ![]() ![]() The required coil size is determined by load while the required number of coils (length) is determined by the anticipated range of movement. Each coil arrangement has a spring rate expressed in units of pounds/inch (or kilograms/millimeters) of compression. The way a variable spring support responds to an applied load depends on the coil or coils inside the casing. The travel range of the springs remains unchanged. When ordering Type G, divide the total pipe load in half to select the proper spring size. The assembly can be furnished with center-to-center dimensions, as specified by the purchaser. Type G assembly can accommodate unusually heavy loads and is especially adaptable for avoiding interference in spaces where the headroom is limited. Type G: The spring support assembly is formed by welding two standard spring assemblies to the ends of a pair of channels. With downward movement from cold to hot position: The installed height should be the midpoint between the minimum “X” dimension plus the load flange thickness plus the amount of the vertical movement.With upward movement from cold to hot position: The installed height should be the midpoint between the minimum and maximum “X” dimension plus the thickness of the load flange.The installed height of the base (F-type) spring should be specified as follows: The base plate is bolted to the case and has four holes for fastening. Adjustment is made by inserting a bar into holes in the load column and turning the load column as a jackscrew. Type F: The spring support is designed to support piping from below, directly from the floor or supporting steel. ![]() The type E spring is set above the supporting steel or can be welded directly to the supporting steel from below. Type E: The spring support permits rod adjustment from either above or below the spring. In type D, the spring is set above the supporting steel. The tubing is securely welded to the spring cap. Type D: The spring support permits adjustment from the top, by turning the nuts on the hanger rod against a piece of tubing. Type B & C: The spring supports are furnished with one or two lugs welded to the top cap plates of the casing. Type A: The spring support is furnished with a threaded bushing in the top plate, providing for a simple rod attachment for the upper connection. Hangers are suspended from structural members while base supports (Type F) rest on a supporting surface. The figure below illustrates the applications and the physical connections for each type. The term “type” is used with an alphabetical designation (A-G) to describe seven different physical connections to the supporting structure. In this section, you will find our standard variable and constant pipe supports. At Piping Technology & Products, Inc., we always keep these guidelines in mind and manufacture your supports to their strict specifications. Moreover, many of our customers have their own standards and designs for pipe supports. ASME B31.1 and B31.3 are important standards for piping in the power and petrochemical industries. The Manufacturers Standardization Society (MSS) has standard practices SP-58 and SP-69 which are widely used in our industry. Variable Spring Supports Installation and Maintenance Guide Request A Quote Constant Spring SupportsĬonsidering All Movement in Pipe Support Design Spring Support Sizing & Pipe Stress AnalysisĮngineered Spring Supports – General Information PTP-8-Type G-Quadruple Variable SpringsĬustomization Addendum for Spring Supports PTP-8-Types D, E, & F-Quadruple Variable Springsįig. PTP-8-Types A, B, & C-Quadruple Variable Springsįig. PTP-6-Types D, E, & F – Triple Variable Springsįig. PTP-6-Types A, B, & C-Triple Variable Springsįig. PTP-4-Types D, E, & F-Double Variable Springsįig. ![]() PTP-4-Types A, B, & C-Double Variable Springsįig. PTP-2-Type G-Standard Variable Springsįig. PTP-2-Types D, E, & F-Standard Variable Springsįig. PTP-2-Types A, B, & C-Standard Variable Springsįig. PTP-1-Types D, E, & F-Short Variable Springsįig. PTP-1-Types A, B, & C-Short Variable Springsįig. Piping Alignment and Pipe Strain Solutionsįig.Case Study: Engineered Support for Vibration problem.1400 Pipe Shoe Solution for Vibration in Piping Emergency Custom Steel Structure and Support Design and Fabrication.Spring Support and Expansion Joint Audits.Pipe Stress Analysis for Plant Personnel.Pipe Stress Analysis Case Study – Pump Discharge.High Temperature Pipe Supports (Hot Shoes) (HS-1000 – HS-6060).Cryogenic Pipe Supports (Cold Shoes) (CS-1000 – CS-6080).Pipe Shields Insulated Pipe Supports (Cold & Hot Shoes) (A1000 – G3000).Insulated Pipe Supports (Figures 4500-4800). ![]()
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