PIPER SUPPORT SYSTEM
Carpenter & Paterson (Asia) Ltd offers a comprehensive range of Pipe Support components. This includes both ‘off-the-shelf’ standard support components as well as engineered support components.
CPA’s engineered pipe support solutions enable us to fulfil often very specific client requirements. Such requirements are based upon the unique characteristics of the piping system in question, including available support locations, spacing considerations, pipe size, pipe material, ambient/operating temperature and operating/occasional load, for example.
CPA’s components can be manufactured from a wide range of materials including carbon, stainless and alloy steels. Such materials are available in many different grades. CPA’s standard hot-dip galvanized offering, as well as in-house painting capabilities, ensures that our products remain highly corrosion resistant and suitable for almost all environments. CPA also offer specialist paint finishes as required.
PRODUCT
SPRING SUPPORTS
VARIABLE EFFORT SPRING SUPPORTS |
CONSTANT EFFORT SPRING SUPPORTS |
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Both the AV and LV spring supports are produced in four basic travel ranges; 35mm, 70mm, 140mm and 210mm. These are designated AV35, LV35, AV70, LV70, AV140, LV140, AV210, LV210.
These travel ranges indicate the maximum working range of the springs. This full travel can be used provided that the necessary calculations are carried out to ensure that the connecting equipment and pipework can withstand the load changes that occur during pipe movement. Most national standards do limit the load variation to a maximum of 25%. It is therefore usual to select variable spring supports on this basis. In keeping with generally accepted practice, we recommend that the actual pipe load is correctly supported when the pipe is in its normal working position. This ensures no abnormal or excessive forces, due to out of balance supporting effort, is transferred to the pipework in its stressed working condition. The standard and optional design features of CPA variable supports are as follows: STANDARD DESIGN FEATURES
OPTIONAL DESIGN FEATURES
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A constant effort support is preferred when the use of a variable effort support may be not appropriate for the following reasons:
The Constant Support 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. The constant effort support designed and manufactured by CPA incorporates the latest design concepts to produce a support which provides an essentially constant supporting effort throughout the total travel of the unit. The robust and simple construction of the well-proven C&P design using a bell-crank lever has been enhanced to include universal locking of the load arm.
With a cylindrical spring housing of substantial construction, and several support configurations to suit the position relative to steelwork and available space, the unit can be installed in many arrangements. The spring housing prevents the ingress of foreign bodies such as construction debris, thus reducing the danger of damage or restriction of the unit’s function. The universal locking mechanism allows the load arm to be locked in any position for the purpose of hydrostatic test, maintenance and decommissioning. The locking is done at the load arm so that excessive loadings are not transferred to the spring tension rod and spring coil. The threaded rods which are used for universal locking, are removed once the support has been installed and are stowed on the side of the spring housing. STANDARD DESIGN FEATURES
SPECIAL DESIGN FEATURES
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CRYOGENIC SUPPORTS
CRYOGENIC SUPPORTS |
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CRYOGENIC SUPPORTSCryogenic pipe supports are necessary when producing, processing, transporting and distributing liquefied gases such as Liquefied Natural Gas (LNG) or Liquefied Petroleum Gas (LPG) which can reach temperatures as low as -165°c. CPA manufactures cryogenic pre-insulated pipe supports (also known as ‘cold shoes’) incorporating high density polyurethane foam (HD PUF) as a highly effective load bearing cryogenic insulation medium. CPA’s cryogenic supports are engineered in order to fulfil specific client requirements which may vary according to several factors, including load carrying capacity and installation restrictions, for example. |
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PTFE SLIDE BEARINGS
PTFE SLIDE BEARINGS |
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The slide bearing possesses an extremely low coefficient of friction, thus enabling the stainless steel plate to slide easily against the PTFE material.
Key advantages of PTFE slide bearing:
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WITCHLINER
WITCHLINER™ |
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WITCHLINER™CPA manufactures its trademark WITCHLINER™ isolation material using either of the following materials: 78/80 FR Neoprene (temperature range -30°c to 100°c)
Silicone (temperature range -70°c to 300°c)
Where necessary, WITCHLINER™ also provides an effective solution to isolating differing grades of steel from one another (e.g. a stainless steel pipe from carbon steel pipe clamp) thus preventing surface contamination or bimetallic corrosion. This often results in significant cost saving for clients. CPA’s standard range of WITCHLINER™ isolation products is shown below. Other special designs and models are available to suit specific customer requirements. |
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