It can be furnished with single lug suspension or double lug suspension as shown above. The single rod suspension must be mounted flush to the bottom of the beam where the suspension rod is 1/4 inch thicker than J-Rod. Support the pipe at the desired elevation. • WT – Maximum weight for the load range, Download PTP 100-G Constant Spring Support PDF. Download PTP 200-E Constant Spring Support PDF. The load ranges in the tables below are half the total load lifted by the assembly, with the pipe line seated in the center of the C-C dimension, where each constant carries half the total load. Figure PTP 100-G assembly consists of two inverted vertical constants attached with a channel as shown above. Figure PTP 100-B is a vertical constant suspended from a beam. PTP 100 – G-Constant Spring Secure the hanger to a structure capable of handling the operating load, at a point where the constant’s load coupling is directly over the desired point of attachment to the pipe in the operating position. Using the turnbuckles, adjust the load indicator to the cold position. maximum recommended variation according to MSS standard from the operating load is 25% for variable spring hangers. If pin cannot be easily removed after struts adjustment, do not drive pin out. Cold and hot loads shall be the same. 3. Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. • D – Load flange position for down travel ... NOTE-3: Number of hangers at location: For better stability, the base type spring support of 24″ and larger are used with 2 spring cans. on the high side (the other load of 2,361 lb. Remove the travel stops. Fig. Spring Support Sizing & Pipe Stress Analysis, Why PT&P Spring Supports Travel stops are installed in all constants before shipping. Download  PTP 200-D Constant Spring Support PDF. Constant load takes place through its range by a perfect counter balance crank lever where load and spring movements through the pivot ensure the minimum kinetic variation. 1. portalId: "88145", PTP 100 – C-Constant Spring The MSS standard provides for a tolerance of 6% in the constant load through the travel range. Our constant support hangers are designed per MSS, ANSI, and ASME standards. With an appropriate choice of moment arms and spring properties, a resisting force can be provided that is nearly independent of position. Anchorage Constant Spring Supports are designed to allow the supported pipework to expand vertically upwards or downwards, whilst maintaining a constant supporting effort throughout the travel range. The Type G constant consists of two Type 100 constants connected by a beam, with the pipe being supported on the beam. If the clearance is tight, temporarily force the table down by loosening the 2 travel stop nuts on top of the angles, then tightening the nuts below. PTP 200 – F-Constant Spring The hanger load needs to be increased if the pin is in position A, or decreased if the pin is in position C. Once disengaged, the travel stop may be stored by hanging it from the constant. 8. • E – J Rod position for up travel PTP 100 – D-Constant Spring • L – Maximum length for the load range Fig. For these situations, PT&P has the following solutions: – Estimate the load based on the pipe and media specification and estimate movement from existing spring support This concept utilizes the principle of a varying leverage about a main pivot… Bottom Mounted Constant Spring Supports. Our constant hangers and constant supports offer the user a large number of special benefits: Principle-based constancy by way of a special mode of operation. 1400 Pipe Shoe Solution for Vibration in Piping, Case Study: Engineered Support for Vibration problem, Piping Alignment and Pipe Strain Solutions. The load is suspended from one of these arms, and a spring is attached to the other. The Pipe Stress model determines how the piping can be designed to move and avoid placing under stress on the nozzles to equipment and the piping itself. Step 1: Determine The Load: this is the load (installed/operating) of the equipment or piping (including tare / dead weight), which the constant is to support. Attach load rods to the structural support. If axial movement cannot be tolerated, then a PTP figure 100 type U (vertical upthrust constant) would be appropriate for the application. It can be furnished either with single rod suspension or double rod suspension as shown above. Blue: over travel (MAX AVAILABLE) position. Fig. *Drawing shown for down travel Piping Technology & Products’ constant support hangers are principally used to support pipes and equipment subjected to vertical movement due to thermal expansion at locations where the transfer of stress to other supports or equipment can be critical. ORDERING: Specify figure number, size, type, load, actual travel, total travel, direction of travel, and C-C dimension. This is vertical for Figure 100, and horizontal for Figure 200. Constant Spring Support And Hanger, Constant Spring Support And Hanger Suppliers Directory - Find variety Constant Spring Support And Hanger Suppliers, Manufacturers, Companies from around the World at truck spring hanger ,spring hanger ,trailer spring hanger, Springs. It can be furnished with single lug suspension or double lug suspension as shown above. Loosen the main nut, then retighten the lock nut. Considering All Movement in Pipe Support Design These must be present during installation and any hydro testing, but must be removed before normal operations. Actual Travel = 3.35” The maximum recommended variation according to MSS standard from the operating load is 25% for variable spring hangers. Our Constant Spring supports are cold/preset to the load specified by our client’s in our factory. This constant resistance is achieved by having two-moment arms pivoted about a common point. Size Range: Anvil Model R constant support hangers are made in two basic designs, 80- V (vertical design) and 81-H (horizontal design). Customization Addendum for Spring Supports, Sizing & Stress Analysis The travel stop (painted red) should now slip out easily. Download PTP 200-A Constant Spring Support PDF. White: installation (COLD) position PTP 100 – N-Nano-Constant Spring, Fig. • TO – Take out for down travel The base plate is bolted directly to the top of the steel or floor. Transfer the load by turning on the turnbuckle before removing the travel stop. Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. After the load reaches normal operating conditions, check to see that the load indicator is at the hot position. • L – Maximum for the load range If the clearance is bigger than 3/8″, shim or grout the constant or pipe attachment accordingly. For load and travel not in the tables, please call for dimensions. on the high side (the other load of 2,277 lb. Reduced friction due to minimised number of bearing points. PTP figure 100 type F (Layout-B) is a vertical constant designed to support piping from below. • WT – Maximum weight for the load range, Download PTP 200-U Constant Spring Support PDF. This constant supports vertical movement subjected by the total travel and no axial or lateral movement from its load flange unless a slide plate is added. 4. Example         Figure = 200       Type = C        Load = 2,356 lb. According to MSS-SP-58, the maximum recommended variation from the operating load for variable spring hangers is 25 %. For minor vertical travel the Variable Load Support is normally used, whereas the Constant Load Support should be used for greater levels of thermal expansion. Download PTP 100-D Constant Spring Support PDF. Fig. The load each constant carries must include half of the assembly’s weight as the whole assembly moves. Keeping the channels level, transfer the pipe load to the constant, either by raising the constants or removing any temporary support for the pipe. Figure PTP 100-C is a vertical constant suspended from a beam. If axial movement cannot be tolerated, then a Figure PTP 200-U horizontal upthrust constant would be appropriate for the application which only allows for vertical movement. Total Travel = Actual Travel + Over Travel. Spring coils are supplied plastic-coated as standard. With a J-Rod of 3/4” and a load of 2,356 lb. Fig. Fig. The design, using a compression spring, a lever, and a spring tension rod, creates a moment counterbalancing about the main pivot pin. From the Figure 200 Type-C list of tables (see Page 81), the J-Rod and Lug Selection table for a load of 2,356 lb. 3. Thus, the total travel is 9” rounded to the upper 1/2”. However, to provide for situations where the supported load is different from the calculated load, the constant spring hangers are equipped with load adjustment capability. 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. • E – J-Rod position for up travel • WT – Maximum weight for the load range, Download PTP 100-B Constant Spring Support PDF. Download PTP 200-C Constant Spring Support PDF. • F – Maximum length for the load range Once the load is transferred, the travel stop must be removed. Spring Supports sizing is determined by a Pipe Stress Model which assesses the thermal growth and associated stress on the piping, nozzles, etc. The single rod suspension must be mounted flush to the bottom of the beam where the suspension rod is 1/4 inch thicker than J-Rod. Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. • E – Maximum for down travel Having the total travel and load, the constants are sized per the constant load table. In this system, the external load remains uniform while the moment around its fixed pivot point varies during displacement (due to changes in moment arm length). If required, hydro testing should be done at this time. Constant Spring Hangers are also used where load variation over 6% is not permitted, even if the vertical movement is not large. which falls in the load range of 766 – 2402, the Rod Take Out (RTO) for up travel is 21 11/16 (15 11/16 + 6, for up travel according to the note at the bottom of the table) and all other physical dimensions are given in the same row. From this table under the same column the lug information is provided. Types that support piping from above would be types (A, B, C, D, E, and G), as in the above examples. Load adjustment in the field is discouraged as it may significantly change the system. Constant Spring hanger- Load remains constant throughout its operating range. The sizing of a constant is independent and not related to its dimensions. Piping Technology & Products’ constant spring hanger, usually referred to as a constant, provides constant support force for pipes and equipment subjected to vertical movement due to thermal expansion at locations where maintaining a constant stress is critical. • TO – Take out for up travel • F – Maximum length for the load range Constant Spring Supports. • E – J-Rod position for up travel For a total travel of 4 1/2” on the top row of the constant load table with a load of 2,456 lb. If this is the case, to clear the depth of the supporting steel, the rod take out (RTO) can be specified to exceed the minimum. The constants are suspended via J-Rods from a beam. The rod take out (RTO) given in the tables below are minimum and may not exceed the depth of the supporting steel. PTP 200 – E-Constant Spring The travel stop pin must be engaged before load adjustment is performed. It is important to understand that this constant has vertical movement subjected by the total travel and an axial movement (E) due to the angle of rotation. The PT&P Nano-ConstantTM is the world’s smallest constant by a wide margin. The next step would be to select a support type. Piping Technology & Products’ constant spring hanger, usually referred to as a constant, provides constant support force for pipes and equipment subjected to vertical movement due to thermal expansion at locations where maintaining a constant stress is critical. 7. The MSS standard provides for a tolerance of 6% in the constant load through the travel range. If not, adjust with the turnbuckles. Fig. Both constant support styles, style 100 (with a vertical coil housing orientation), style 200 (with a horizontal coil housing orientation), function in the same manner. Loosen the travel stop nuts below the angles to allow the load flange to rise up to the installed height: 3/8″ max. Total Travel = 5 1/2” UP • M – Maximum height for the load range – Perform a Pipe Stress Analysis to determine exact load and movement. • D – J-Rod position for down travel PTP 100 – E-Constant Spring View Constants Ordering Checklist, Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. If not, adjust the load until they are.Do not drive them out. 6. 1.0 TECHNICAL DESCRIPTION 1.1 DESIGN DETAILS The Constant Spring Support designed and manufactured by Carpenter & Paterson Ltd incorporates the latest design concepts, resulting in a constant support effort through the total travel of the unit. Constant springs are used to support piping whose movements and/or loading conditions cause too great a variability or too high of a loading condition for a variable spring. Fig. If hydro testing is required, this should be done now. To decrease the cold setting be sure that the travel stoop pin is in place. Fig. • WT – Maximum weight for the load range, Download PTP 200-F Constant Spring Support PDF. The constant effort support is now ready for operation. The rod take out (RTO) given in the tables below are maximum and made to not reach the supporting steel. Given an actual travel of 3.35”, which is under 5”, the amount of over travel is 1”. Figure PTP 100-A is a vertical constant suspended from a beam. • M – Maximum height for the load range Constant Spring Effort Pipe Support picture from SHANDONG JIANENG TECHNOLOGY CO., LTD. view photo of Spring Support, Constant Effort, Spring Hanger.Contact China Suppliers for … 4. J-rod swings at least 4° from vertical. The load adjustment capability consists of a load adjustment scale and indicator, which are used to increase (Figure 10A) or decrease (Figure 10C), the load by 10%. The over travel is a safety margin to allow for the discrepancy between the calculated and actual travel. The cam is designed such that the distances from the main pivot changes to compensate for the variable resistance during compression of the coil. *Drawing shown for up travel. They should be easily removed. Note that if the pipe line is not centered in the C-C dimension, then one constant in the assembly will carry a heavier load than the other. Constant Spring Hanger Supports are use when this variation exceeds 25%. Example 2          Load = 2,400 lb. Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. a) For actual travel less than 5 inches, the over travel is 1 inch. Note that the rod take out (RTO) for the single rod suspension must be adjusted by subtracting 1/4 inch from the values given in the tables below. 5. • F – Maximum length for the load range Quality inspection and machine tests are also applied for ensuring its robust construction and high … Screw Threads are ISO-metric coarse pitch series (6mm pitch series above size M64). Special Constant Supports can be designed for higher loadings or travels than are covered by the standard range. In our first quote for an offshore application, we supported 7,000 lb. Figure PTP 200-D is a horizontal constant with top attachment which is bolted directly to the bottom of the steel as shown above. Constant Spring Support 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. • E – J-Rod position for up travel Then loosen the lock nut at the end of the spring. Have questions regarding our products or need a quote? PT&P is almost always very cost-effective for Pipe Stress Analysis. – Weigh the Piping to determine the load and estimate movement from existing spring support Our products are … Constant Spring Supports. 4. ORDERING: Specify figure number, size, type, load, actual travel, total travel and direction of travel. 9. 1400 Pipe Shoe Solution for Vibration in Piping, Case Study: Engineered Support for Vibration problem, Piping Alignment and Pipe Strain Solutions, Customization Addendum for Spring Supports, Spring Support Sizing & Pipe Stress Analysis, Engineered Spring Supports – General Information, Variable Spring Supports vs. • E – J-Rod position for up travel To increase the cold setting be sure that the travel stop pin is in place. and 7″ of movement in a 0.89 Cubic Foot envelope. For load and travel not in the tables, please call for dimensions. PT&Ps’ constant support hangers are principally used to support pipes and equipment subjected to vertical movement due to thermal expansion at locations where the transfer of stress to other supports or equipment can be critical. Figure PTP 100-U is a vertical constant designed to support piping from below. • RTO – Rod take out for down travel If this is the case then each constant could be a different size and the tables below might not apply. • WT – Maximum weight for the load range, SUBTRACT 1/4″ OF THE ROD TAKE OUT (RTO) FOR SINGLE ROD SUSPENSION ONLY FROM THE TABLES BELOW, Download PTP 200-B Constant Spring Support PDF. PTP figure 100 type F (Layout-A) is a vertical constant designed to support piping from below using a Sway Strut. All constants are shipped with at least 3 color-coded rivets (red, white and blue). Supports are supplied with hot-dip galvanized finish as standard. The following examples will illustrate the procedure. Our constant support hangers are designed per MSS, ANSI, and ASME standards. Note that 8. Loosen and raise up the travel stop nuts above the angles at least a nut thickness to allow the removal of the travel stop rods. Engineered Spring Supports – General Information The hanger rod and loading arm of the constant should be unobstructed. PTP 100 – F-Constant Spring Figure PTP 200-B is a horizontal constant suspended from a beam. • D – J-Rod position for down travel Constant Spring Supports. • D – Minimum for up travel • WT – Maximum weight for the load range. For a given total travel on the top row of the constant load table, select the operating load on the high side under the column. 2. It can be furnished with single lug suspension or double lug suspension as shown above. The base plate is bolted directly to the top of the steel or floor as shown above. Figure PTP 200-F is a horizontal constant designed to support piping from below. Using the turnbuckles, level the pair of channels connecting the two constants. The travel stop pin must be engaged before load adjustment is performed. For all constant spring supports there is no difference in load and the supported load will … • TO – Take out for up travel MENU MENU Alibaba.com. }); PT&P has set up it's manufacturing to offer an unparalleled set of customization options with minimal impact on delivery timeframes. Figure PTP 200-E is a horizontal constant with base plates which are bolted directly to the top of the steel as shown above. • D – J-Rod position for down travel Special Design Features. The Type 200 – F constants are shipped with two installation rods. Tighten the main nut, then retighten the lock nut. • TO – Rod Take out for up travel The load adjustment capability consists of a load adjustment scale which is used to increase (Figure A) or decrease (Figure C) the load up to 10%. Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. • D – J-Rod position for down travel The hanger load should now be readjusted to the cold (white mark) position. English Sourcing Solutions Services & Membership Help & Community Ready to Ship Trade Shows Get … Backed with rich industry experience, we do design, engineering , manufacturing, testing of Constant Spring Hanger and Supports to our clients. The base plate is bolted directly to the top of the steel or floor as shown above. ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED Constant Spring Hangers are designed to support piping and equipment where large vertical movements are expected and where the load variability of a variable spring hanger would exceed 25% of the design load. 3. If this is the case, to clear the depth of the supporting steel, the rod take out (RTO) can be specified to exceed the minimum. PTP 100 – A-Constant Spring For all constant spring supports there is no difference in load and the supported load will remain uniform throughout the deflection cycle. • D – J-Rod position for down travel Comparative Corrosion Resistance Guide, Installation & Maintenance • F – Maximum length for the load range Example 1           Load = 2,400 lb. b) For actual travel of 5 inches and over, the over travel is 20% of the actual travel. Attach the constant to the load rods using the turnbuckles provided. • F – Maximum length for the load range • RTO – Rod take out for down travel It can be furnished with single lug suspension or double lug suspension as shown above. This constant supports vertical movement subjected by the total travel and no axial or lateral movement from its load flange unless a slide plate is added. Fig. 6. PHYSICAL DIMENSIONS OF CONSTANTS ORDERING: Specify figure number, size, type, load, actual travel, total travel and direction of travel. They are usually pins, but in some cases may be keys. Type G Constant • RTO – Rod take out for down travel For load and travel not in the tables, PLEASE CALL FOR DIMENSIONS. Constant Spring & Hangers are used in critical pipelines and also at locations where it is necessary to avoid any transfer of force or stress. The amount of over travel is determined by the method outlined below: is 3/4”. PTP 100 – U-Constant Spring • F – Maximum length for the load range PTP figure 100 type E (Layout-A) is a vertical constant with a base plate which is bolted directly to the top of the steel. The constant resistance to a load is achieved by combining a spring coil with a cam which rotates about a main pivot point. hbspt.forms.create({ PTP 200 – A-Constant Spring Constant Spring Supports. Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. increasing or decreasing the load by 10% does not affect the total travel. 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