Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. 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. Then loosen the lock nut at the end of the spring. 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. If the variation exceeds 25%, a constant support hanger should be used. 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. Constant Spring & Hangers are used in critical pipelines and also at locations where it is necessary to avoid any transfer of force or stress. Download PTP 100-E Constant Spring Support PDF, Layout -A Shown | For Layout-B, scroll down. • RTO – Rod take out for down travel Figure PTP 200-E is a horizontal constant with base plates which are bolted directly to the top of the steel as shown above. Constant Spring Supports, Considering All Movement in Pipe Support Design, Constant Springs Installation & Maintenance Guide, View more details on how we can customize your constant spring support, *Rod Take Out (RTO) is for down travel [ Add 6 inches for up travel ], *Rod Take Out (RTO) is for down travel [ Add 8 inches for up travel ], *Rod Take Out (RTO) is for down travel [ Add 10 inches for up travel ], *Rod Take Out (RTO) is for down travel [ Add 12 inches for up travel ], *Rod Take Out (RTO) is for down travel [ Add 14 inches for up travel ], *Rod Take Out (RTO) is for down travel [ Add 4 inches for up travel ], “Rod Take Out (RTO) is for up travel [subtract 4 inches for down travel ], “Rod Take Out (RTO) is for up travel [subtract 10 inches for down travel ], “Rod Take Out (RTO) is for up travel [subtract 12 inches for down travel ], “Rod Take Out (RTO) is for up travel [subtract 14 inches for down 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 ], *Take Out (TO) is for up travel [ Add 4 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 ]. MENU MENU Alibaba.com. • WT – Maximum weight for the load rang, Download PTP 100-C Constant Spring Support PDF. The travel stop pin must be moved to the center of its hole by adjusting the hanger load. Constant Spring Supports. To perform a Pipe Stress Analysis, PT&P will need Isometrics and overall specifications for the line. • D – Minimum height Figure PTP 100-D is a vertical constant with a top attachment which is bolted directly to the bottom of the steel as shown above. The travel stop pin must be engaged before load adjustment is performed. Constant Spring Supports. The Constant Effort Spring Supports is based on a simple mechanical principle: In order to produce a constant supporting effort, the load moment about the main pivot must be counterbalanced by an equal spring moment throughout the travel range (see diagram). is the low side) gives a constant size of 44 in the first column. With a J-Rod of 3/4” and a load of 2,356 lb. Constant Springs Installation & Maintenance Guide. Having the total travel and load, the constants are sized per the constant load table. • F – Maximum length for the load range 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. • D – J-Rod position for down travel • WT – Maximum weight for the load range (per side) Considering All Movement in Pipe Support Design 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%. 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. • L – Maximum for the load range The load is suspended from one of these arms, and a spring is attached to the other. The Load Adjustment Scale is located on the spring can, near the adjustment nut. • D – Minimum for up travel Download PTP 100-D Constant Spring Support PDF. It is important to understand that this constant has vertical movement subjected by the total travel and an axial movement (E – D) due to the angle of rotation. Attach load rods to the structural support. 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. 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. 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 • E – J Rod position for up travel • D – J Rod position for down travel • WT – Maximum weight for the load range. Re-tighten the 2 travel stop nuts above the angles. Under no circumstances should an attempt be made to remove the lock nut and the load adjustment nut from the constant spring hanger. Special Constant Supports can be designed for higher loadings or travels than are covered by the standard range. 1. Red: operating (HOT) position Every constant spring hanger is calibrated in the factory and set to the load specified on the nameplate. The following examples will illustrate the procedure. The key to selecting a constant support style would be the space available for that support above, below and around the piping (see below). If not, refer to Figure 5. This concept utilizes the principle of a varying leverage about a main pivot… • WT – Maximum weight for the load range. Actual Travel = 3.35” For all constant spring supports there is no difference in load and the supported load will remain uniform throughout the deflection cycle. PT&P is almost always very cost-effective for Pipe Stress Analysis. Load adjustment in the field is discouraged as it may significantly change the system. 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. ORDERING: Specify figure number, size, type, load, actual travel, total travel, direction of travel, and C-C dimension. Figure PTP 100-C is a vertical constant suspended from a beam. White: installation (COLD) position The cam is designed such that the distances from the main pivot changes to compensate for the variable resistance during compression of the coil. For can type springs the spring height should be kept minimum from a stability point of view. Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. Fig. • F – Maximum length for the load range Constant Spring Supports. For load and travel not in the tables, please call for dimensions. 3. Spring Supports sizing is determined by a Pipe Stress Model which assesses the thermal growth and associated stress on the piping, nozzles, etc. Given an actual travel of 7.10”, which is over 5”, the amount of over travel is 1.42”. Transfer the load by turning on the turnbuckle before removing the travel stop. 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. The constant resistance to a load is achieved by combining a spring coil with a cam which rotates about a main pivot point. 8. J-rod swings at least 4° from vertical. SIZING CONSTANTS (Examples) 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. • TO – Take out for up travel formId: "387a2f0a-000b-4fec-ace9-674cd4cf472e" • M – Maximum height for the load range This is vertical for Figure 100, and horizontal for Figure 200. Spring hangers and spring supports are used to balance slight vertical displacements in the pipe system. 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. Customization Addendum for Spring Supports, Sizing & Stress Analysis PTP figure 100 type F (Layout-A) is a vertical constant designed to support piping from below using a Sway Strut. The spring support basically employs a spring element, which can get compressed or stretch-out depending upon the thermal movement of pipe and the corresponding loads. Please call for dimensions on such special designs. From this table under the same column the lug information is provided. The travel stop pin must be engaged before load adjustment is performed. If the clearance is bigger than 3/8″, shim or grout the constant or pipe attachment accordingly. }); PT&P has set up it's manufacturing to offer an unparalleled set of customization options with minimal impact on delivery timeframes. hbspt.forms.create({ 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. PTP 200 – F-Constant Spring For a total travel of 9” on the top row of the constant load table with a load of 2,413 lb. Reduced friction due to minimised number of bearing points. Figure PTP 200-C is a horizontal constant suspended from a beam. 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. The rod take out (RTO) can be specified to exceed the maximum. • F – Maximum length for the load range When the operating conditions are reached, check the hanger to assure the indicator is at the hot (red mark) position. Constant Hangers with Adjustable Travel Stop Keys: Removal of Travel Stop Key. The travel stop (painted red) should now slip out easily. Constant Spring Supports • RTO – Rod take out for down travel – Perform a Pipe Stress Analysis to determine exact load and movement. 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. To increase the cold setting be sure that the travel stop pin is in place. • RTO – Rod take out for down travel • WT – Maximum weight for the load range, Download PTP 100-B Constant Spring Support PDF. Figure 10: Field adjustment for load. Constant Spring Hangers are also used where load variation over 6% is not permitted, even if the vertical movement is not large. The following example will illustrate the procedure. The maximum recommended variation according to MSS standard from the operating load is 25% for variable spring hangers. • D – J-Rod position for down travel The hanger rod and loading arm of the constant should be unobstructed. The constant resistance to a load is achieved by combining a spring coil with a cam which rotates about a main pivot point. ORDERING: Specify figure number, size, type, load, actual travel, total travel and direction of travel. Fig. Pre-relaxed springs eliminate any significant loss of load-bearing capacity. 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. This avoids additional loadings at the component connections to the pipework. Figure PTP 100-G assembly consists of two inverted vertical constants attached with a channel as shown above. Constant Spring Hanger Supports are use when this variation exceeds 25%. Bottom Mounted Constant Spring Supports. Fig. Figure PTP 200-U is a horizontal constant designed to support piping from below. • WT – Maximum weight for the load range, Download PTP 200-U Constant Spring Support PDF. Download PTP 100-N Nano-ConstantTM Spring Support PDF. ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED Figure PTP 200-A is a horizontal constant suspended from a beam. The base plate is bolted directly to the top of the steel or floor. If not, adjust with the turnbuckles. Having started as a Pipe Stress Engineering company, PT&P has deep experience in Pipe Stress Analysis. Quality inspection and machine tests are also applied for ensuring its robust construction and high … The design, using a compression spring, a lever, and a spring tension rod, creates a moment counterbalancing about the main pivot pin. Total Travel = 5 1/2” UP 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. These must be present during installation and any hydro testing, but must be removed before normal operations. Thus, a 2000-pound hanger can be adjusted for loads from 1800 to 2200 pounds. • E – J-Rod position for up travel Spring Supports are used for supporting piping and related components which are subject to thermal expansion. According to MSS-SP-58, the maximum recommended variation from the operating load for variable spring hangers is 25 %. Types that support piping from above would be types (A, B, C, D, E, and G), as in the above examples. Our constant support hangers are designed per MSS, ANSI, and ASME standards. • F – Maximum length for the load range Size Range: Anvil Model R constant support hangers are made in two basic designs, 80- V (vertical design) and 81-H (horizontal design). It can be furnished with single lug suspension or double lug suspension as shown above. Keeping the channels level, transfer the pipe load to the constant, either by raising the constants or removing any temporary support for the pipe. The MSS standard provides for a tolerance of 6% in the constant load through the travel range. PTP 200 – U-Constant Spring, Travel 1-1/2″ – 7-1/2″ They are usually pins, but in some cases may be keys. PTP 200 – E-Constant Spring Constant Spring Supports. Fig. • D – Minimum for up travel 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. • A – Minimum for down travel increasing or decreasing the load by 10% does not affect the total 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 … In either case, the load must be adjusted so that the travel stop is easily removed. These components work on the basis of pre-set helical coil springs which exert a variable supporting load over the range of movement in accordance with their specified spring characteristics. 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. Fig. The next step would be to select a support type. 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. 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. Figure PTP 200-F is a horizontal constant designed to support piping from below. • L – Maximum length for the load range 1. *Drawing shown for down travel Travel stops are installed in all constants before shipping. The Type 200 – F constants are shipped with two installation rods. • M – Maximum height for the load range For load and travel not in the tables, please call for dimensions. Using the turnbuckles, level the pair of channels connecting the two constants. Have questions regarding our products or need a quote? 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. This constant resistance is achieved by having two-moment arms pivoted about a common point. If required, hydro testing should be done at this time. • E – J-Rod position for up travel Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. 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. The geometric design of the constant support provides a mathematically constant amount of force exerted throughout the entire range of travel. Constant Spring Supports : The Constant load hanger uses the Bell Crank Lever & helical spring Mechanism to provide a constant supporting force over its entire travel range. 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. Actual Travel = 7.10” Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. Figure PTP 200-D is a horizontal constant with top attachment which is bolted directly to the bottom of the steel as shown above. 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. Every constant spring hanger is calibrated in the factory and set to the load specified on the name plate (Figure B). Load adjustment in the field is discouraged as it may significantly change the system. For a total travel of 4 1/2” on the top row of the constant load table with a load of 2,456 lb. PTP 100 – G-Constant Spring Then loosen the lock nut at the end of the spring. • D – J-Rod position for down travel After the load reaches normal operating conditions, check to see that the load indicator is at the hot position. Loosen the travel stop nuts below the angles to allow the load flange to rise up to the installed height: 3/8″ max. Travel 8″ – 14″ PTP 100 – B-Constant Spring For load and travel not in the tables, PLEASE CALL FOR DIMENSIONS. Example         Figure = 200       Type = C        Load = 2,356 lb. This range of bottom mounted constant spring supports offered by us is for high vertical travel in pipeline , ( say more than 50mm onwards) . Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. Inspection and Maintenance of Supports Comparative Corrosion Resistance Guide, Installation & Maintenance Quality Pipe Supports (QPS) Ltd. 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. PTP 200 – A-Constant Spring If axial movement cannot be tolerated, then a PTP figure 100 type U (vertical upthrust constant) would be appropriate for the application. portalId: "88145", Another issue that comes up from many customers is the need to replace spring supports for which the load information has been lost. • F – Maximum length for the load range 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. This avoids additional loading’s at the component connections to the pipework. Engineered Spring Supports – General Information Covered spring provides protection and good appearance. 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. • M – Maximum height for the load range Load variations resulting from this are limited through the stress analysis calculations, depending on the sensitivity of … • F – Maximum length for the load range Cold and hot loads shall be the same. Figure PTP 100-U is a vertical constant designed to support piping from below. The rod take out (RTO) given in the tables below are minimum and may not exceed the depth of the supporting steel. The amount of over travel is determined by the method outlined below: of load and 4″ of movement in an 8″ x 10″ x 29″ envelope. Figure PTP 100-A is a vertical constant suspended from a beam. Fig. Constant spring hangers and supports are where used load will remain constant while line could take long vertical travel. 3. Our constant supports/hangers are manufactured mainly in horizontal and vertical models. Methods of Protecting against Corrosion Blue: over travel (MAX AVAILABLE) position. 2. For load and travel not in the tables, please call for dimensions. 7. • TO – Take out for down travel 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 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" … The rod take out (RTO) given in the tables below are maximum and made to not reach the supporting steel. ORDERING: Specify figure number, layout, size, type, description, load, actual travel, total travel and direction of travel. This picture below shows the Nano-Constant featured in our launch which supported 765 lb. Travel 14-1/2″ – 20″, Customization Options a) For actual travel less than 5 inches, the over travel is 1 inch. 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. Important Notes: ALL DIMENSIONS ARE IN INCHES UNLESS OTHERWISE NOTED. 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. For load and travel not in the tables, please call for dimensions. • TO – Rod Take out for up travel 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. 2. The sizing of a constant is independent and not related to its dimensions. • CH – Size of channel, Download PTP 100-U Constant Spring Support PDF. Fig. • L – See side view of PTP 100-D Constant Spring hanger- Load remains constant throughout its operating range. Example 1           Load = 2,400 lb. Note that The PT&P Nano-ConstantTM is the world’s smallest constant by a wide margin. – Weigh the Piping to determine the load and estimate movement from existing spring support Our constant support hangers are designed per MSS, ANSI, and ASME standards. 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. Hydro test line if necessary. • D – J-Rod position for down travel English Sourcing Solutions Services & Membership Help & Community Ready to Ship Trade Shows Get … Types of Constant Effort Supports. 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. on the high side (the other load of 2,361 lb. The cam is designed such that the distances from the main pivot changes to compensate for the variable resistance during compression of the coil. • TO – Take out for up travel • RTO – Rod take out for down travel With an appropriate choice of moment arms and spring properties, a resisting force can be provided that is nearly independent of position. Designation figure 100 and 200 refer to the bottom of the coil in different sizes and specifications =... View more details on how we can customize your constant spring Supports use... Out ( RTO ) given in the tables, please call for DIMENSIONS 100 and 200 refer the... Below using a Sway Strut ( red, white and blue ) exceeds 25 % the of... 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