Actual Travel = 3.35” • D – J-Rod position for down travel Constant Spring Supports. ORDERING: Specify figure number, size, type, load, actual travel, total travel and direction of travel. The sizing of a constant is independent and not related to its dimensions. If the variation exceeds 25%, a constant support hanger should be used. PTP 100 – E-Constant Spring Figure PTP 200-U is a horizontal constant designed to support piping from below. The simplified construction, together with the compression spring working in conjunction with a bell crank lever, achieves a mathematically perfect counter-balancing of spring and load moments about the main pivot point. 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. Constant Spring Supports. Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. Bottom Mounted Constant Spring Supports. The constant resistance to a load is achieved by combining a spring coil with a cam which rotates about a main pivot point. • M – Maximum height for the load range Thus, the total travel is 4 1/2” rounded to the upper 1/2”. Fig. • D – J-Rod position for down travel 6. Travel 14-1/2″ – 20″, Customization Options • TO – Take out for up travel 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. • TO – Take out for up travel The MSS standard provides for a tolerance of 6% in the constant load through the travel range. For load and travel not in the tables, please call for dimensions. 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. Danger!! Découvrez notre large sélection de constant spring support sur support d'étagère ,masque de support et poursuivez le shopping sur m.french.alibaba.com. • A – Minimum for down travel Having started as a Pipe Stress Engineering company, PT&P has deep experience in Pipe Stress Analysis. Constant Spring & Hangers are used in critical pipelines and also at locations where it is necessary to avoid any transfer of force or stress. 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. 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. Figure PTP 200-E is a horizontal constant with base plates which are bolted directly to the top of the steel as shown above. Adjusting the load to a higher or lower load from the load specified on the nameplate using field load adjustment is approximate. Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. 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%. 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. Total Travel = Actual Travel + Over Travel. This spring hanger is used in accomodate the high thermal expansion in Pipeline due to high temperature and load during process or fluied transmission in pipelines. If axial movement cannot be tolerated, then a PTP figure 100 type U (vertical upthrust constant) would be appropriate for the application. • WT – Maximum weight for the load range, Download PTP 200-F Constant Spring Support PDF. 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. 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. With a J-Rod of 3/4” and a load of 2,356 lb. 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. Quality inspection and machine tests are also applied for ensuring its robust construction and high … 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. If pin cannot be easily removed after struts adjustment, do not drive pin out. Given an actual travel of 7.10”, which is over 5”, the amount of over travel is 1.42”. Spring Support Sizing & Pipe Stress Analysis, Why PT&P Spring Supports Re-tighten the 2 travel stop nuts above the angles. For a total travel of 9” on the top row of the constant load table with a load of 2,413 lb. Our constant supports/hangers are manufactured mainly in horizontal and vertical models. Using the turnbuckles, level the pair of channels connecting the two constants. 1. Figure PTP 100-A is a vertical constant suspended from a beam. • D – J Rod position for down travel Fig. Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. • L – See side view of PTP 100-D PTP figure 100 type E (Layout-B) is a vertical constant with a base plate which is bolted directly to the top of the steel. Adjusting the load to higher or lower load from the load specified on the nameplate using load adjustment is approximate and not recommended. Covered spring provides protection and good appearance. Customers can avail these Constant Spring Supports in different sizes and specifications. Inspection and Maintenance of Supports 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. Fig. • WT – Maximum weight for the load range, Download PTP 100-B Constant Spring Support PDF. Then move across to the first column to determine the size of the constant support. Fig. 7. Customization Addendum for Spring Supports, Sizing & Stress Analysis Constant Spring Supports, Constant Spring Supports Suppliers Directory - Find variety Constant Spring Supports Suppliers, Manufacturers, Companies from around the World at gas spring ,pocket spring ,spring mattress, Springs Constant Spring Supports • TO – Take out for up travel Have questions regarding our products or need a quote? • E – J-Rod position for up travel 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 increase the cold setting be sure that the travel stop pin is in place. Download PTP 200-C Constant Spring Support PDF. Then loosen the lock nut at the end of the spring. 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. View more details on how we can customize your constant spring support. • E – J-Rod position for up travel SIZING CONSTANTS (Examples) Combined, the 80-V and 81-H constant supports are made in nine different frame sizes and 110 spring sizes to accommodate travels from 1 1⁄2" to 20" … Our constant support hangers are designed per MSS, ANSI, and ASME standards. It can be furnished with single lug suspension or double lug suspension as shown above. Figure 4 shows the attachment for Types A – E. The designation Figure 100 and 200 refer to the orientation of the spring can. For a total travel of 5 1/2 the table titled Total Travel 4 1/2 to 6 (see Page 82) will be used to get the physical dimensions. 4. Figure PTP 200-C is a horizontal constant suspended from a beam. 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. If this is the case then each constant could be a different size and the tables below might not apply. The dimensions for the standard PT&P constants are listed in the following pages per load and travel. • WT – Maximum weight for the load range, Download PTP 200-U Constant Spring Support PDF. • WT – Maximum weight for the load range, Download PTP 100-F Constant Spring Support PDF, Layout -A Shown | For Layout-B, scroll down Figure PTP 100-U is a vertical constant designed to support piping from below. View Constants Ordering Checklist, Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. Comparative Corrosion Resistance Guide, Installation & Maintenance 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. is the low side) gives a constant size of 44 in the first column. • F – Maximum length for the load range Please call for dimensions on such special designs. • F – Maximum length for the load range If not, refer to Figure 5. It is important to understand that this constant has axial movement subjected by the vertical movement and angle rotation (D – E). 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. 2. 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. PTP 100 – G-Constant Spring • M – Maximum height for the load range This avoids additional loadings at the component connections to the pipework. Fig. Loosen the main nut, then retighten the lock nut. 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. 1.0 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. 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 Range . PTP 200 – C-Constant Spring *Drawing shown for down travel 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 … Transfer the load by turning on the turnbuckle before removing the travel stop. The amount of over travel is determined by the method outlined below: • F – Maximum length for the load range Constant Spring Units are designed to allow the supported pipe work to expand vertically upwards or downwards, whilst maintaining a constant supporting effort throughout the travel range. Hydro test line if necessary. 3. *Drawing shown for up travel. Figure PTP 100-B is a vertical constant suspended from a beam. Screw Threads are ISO-metric coarse pitch series (6mm pitch series above size M64). 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. • CH – Size of channel, Download PTP 100-U Constant Spring Support PDF. hbspt.forms.create({ 7. Download PTP 100-A Constant Spring Support PDF. They should be easily removed. • RTO – Rod take out for down travel • 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. If the variation exceeds 25%, a constant support hanger should be used. If axial movement cannot be tolerated, then a PTP figure 100 type U (vertical upthrust constant) would be appropriate for the application. constant load spring supports The Constant Load Spring Supports (Constant Supports) provide a constant supporting force through the total travel of the support. PTP 100 – C-Constant Spring a) For actual travel less than 5 inches, the over travel is 1 inch. The constant resistance to a load is achieved by combining a spring coil with a cam which rotates about a main pivot point. Attach load rods to the structural support. The constants are suspended via J-Rods from a beam. Download PTP 200-A Constant Spring Support PDF. • D – Minimum height Blue: over travel (MAX AVAILABLE) position. The rod take out (RTO) given in the tables below are minimum and may not exceed the depth of the supporting steel. Our products are … It can be furnished with single lug suspension or double lug suspension as shown above. They are usually pins, but in some cases may be keys. Spring coils are supplied plastic-coated as standard. Constant load throughout the complete load and movement range. China Constant Spring Support manufacturers - Select 2021 high quality Constant Spring Support products in best price from certified Chinese Support Unit manufacturers, Support Bearing suppliers, wholesalers and factory on Made-in-China.com Special Design Features. MENU MENU Alibaba.com. The following examples will illustrate the procedure. of load and 4″ of movement in an 8″ x 10″ x 29″ envelope. – Weigh the Piping to determine the load and estimate movement from existing spring support According to MSS-SP-58, the maximum recommended variation from the operating load for variable spring hangers is 25 %. The hanger rod and loading arm of the constant should be unobstructed. To get the proper dimensions, figure (100 or 200), type (A, B, C, D, E, F, G, U), load, total travel, and direction of travel are required. Another issue that comes up from many customers is the need to replace spring supports for which the load information has been lost. is the low side) gives a constant size of 34 in the first column. • WT – Maximum weight for the load range. We can quote directly from the stress analysis. Special Constant Supports can be designed for higher loadings or travels than are covered by the standard 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. Tighten the main nut, then retighten the lock nut. This avoids additional loading’s at the component connections to the pipework. * If drawings are unattainable or you don’t have access to the ISO drawings, we can perform Laser Scanning on the piping system and generate the drawings. For load and travel not in the tables, please call for dimensions. White: installation (COLD) position 4. maximum recommended variation according to MSS standard from the operating load is 25% for variable spring hangers. Attach the constant to the load rods using the turnbuckles provided. Thus, a 2000-pound hanger can be adjusted for loads from 1800 to 2200 pounds. For a total travel of 4 1/2” on the top row of the constant load table with a load of 2,456 lb. Fig. Few important points to keep in mind while Spring selection. 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. • RTO – Rod take out for down travel Spring Supports sizing is determined by a Pipe Stress Model which assesses the thermal growth and associated stress on the piping, nozzles, etc. 6. 2. • L – Maximum length for the load range • TO – Take out for down travel 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. The cam is designed such that the distances from the main pivot changes to compensate for the variable resistance during compression of the coil. • RTO – Rod take out for down travel 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. Constant Hangers with Adjustable Travel Stop Keys: Removal of Travel Stop Key. In our first quote for an offshore application, we supported 7,000 lb. • WT – Maximum weight for the load range. To perform a Pipe Stress Analysis, PT&P will need Isometrics and overall specifications for the line. The load each constant carries must include half of the assembly’s weight as the whole assembly moves. © 2018 Piping Technology & Products, Inc. All Rights Reserved, Insulated Pipe Supports (Figures 4500-4800), Pipe Shields Insulated Pipe Supports (Cold & Hot Shoes), High Temperature Pipe Supports (Hot Shoes), Pipe Stress Analysis Case Study – Pump Discharge, Spring Support and Expansion Joint Audits, Emergency Custom Steel Structure and Support Design and Fabrication, Case Study: Fig. Given an actual travel of 3.35”, which is under 5”, the amount of over travel is 1”. The spring supports provides continuous support during expansion or contraction of the pipe. Actual Travel = 7.10” Pre-relaxed springs eliminate any significant loss of load-bearing capacity. Load adjustment in the field is discouraged as it may significantly change the system. Reduced friction due to minimised number of bearing points. 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. PTP 100 – F-Constant Spring 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. The key to selecting a constant support style would be the space available for that support above, below and around the piping (see below). 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. The PT&P Nano-ConstantTM is the world’s smallest constant by a wide margin. PTP 200 – U-Constant Spring, Travel 1-1/2″ – 7-1/2″ Constant Spring Support A constant spring is an assembly comprised by a spring and a primary cam mechanism. Every constant spring hanger is calibrated in the factory and set to the load specified on the name plate (Figure B). Types that support piping from above would be types (A, B, C, D, E, and G), as in the above examples. The next step would be to select a support type. Support the pipe at the desired elevation. Constant spring support is specially used to accommodate constant effort load, excessive movement of the pipeline due to high temperature and pressure of thermal movement. • D – J-Rod position for down travel • L – Maximum for the load range Figure PTP 200-B is a horizontal constant suspended from a beam. PTP 200 – D-Constant Spring © 2018 Piping Technology & Products, Inc. All Rights Reserved, ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED, “Rod Take Out (RTO) is for up travel [subtract 6 inches for down travel ], “Rod Take Out (RTO) is for up travel [subtract 8 inches for down travel ], “Take Out (TO) is for down travel [add 4 inches for up travel ], “Take Out (TO) is for down travel [add 6 inches for up travel ], “Take Out (TO) is for down travel [add 8 inches for up travel ], “Take Out (TO) is for down travel [add 10 inches for up travel ], “Take Out (TO) is for down travel [add 12 inches for up travel ], “Take Out (TO) is for down travel [add 14 inches for up travel ], “Take Out (TO) is for up travel [add 4 inches for down travel], “Take Out (TO) is for up travel [add 6 inches for down travel], “Take Out (TO) is for up travel [add 8 inches for down travel], “Take Out (TO) is for up travel [add 10 inches for down travel], “Take Out (TO) is for up travel [add 12 inches for down travel], “Take Out (TO) is for up travel [add 14 inches for down travel], Insulated Pipe Supports (Figures 4500-4800), Pipe Shields Insulated Pipe Supports (Cold & Hot Shoes), High Temperature Pipe Supports (Hot Shoes), Pipe Stress Analysis Case Study – Pump Discharge, Spring Support and Expansion Joint Audits, Emergency Custom Steel Structure and Support Design and Fabrication, Case Study: Fig. Considering All Movement in Pipe Support Design There is no other constant spring hanger in the market that is truly optimized for space and weight considerations. Loosen the travel stop nuts below the angles to allow the load flange to rise up to the installed height: 3/8″ max. Constant Spring Supports 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. Example         Figure = 200       Type = C        Load = 2,356 lb. This concept utilizes the principle of a varying leverage about a main pivot… For all constant spring supports there is no difference in load and the supported load will remain uniform throughout the deflection cycle. • E – Maximum for down travel Total Travel = 5 1/2” UP 9. If required, hydro testing should be done at this time. 3. 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To the bottom of the constant load table with a cam which rotates about a common point be. By turning on the spring can, near the adjustment nut from the operating conditions, to! Ordering Checklist, important Notes: ALL DIMENSIONS are in INCHES UNLESS OTHERWISE NOTED smallest. Set to the bottom of the spring can, near the adjustment nut 20 % of the supporting by! Would be to select a support type piping Alignment and Pipe Strain Solutions before load adjustment is.!, we supported 7,000 lb maximum recommended variation according to MSS standard from the main pivot..