Over25yearsofserving Powergeneration,Petroleum,Nuclear,

1 Over25yearsofservingPowergeneration,Petr oleum, nuclear ,Process,Oil&gas,Offshore,W ater& We were Incorporated in the year 1984 under the name and style of Myricks Piping Systems (P) ltd to manufacture state of the art pipe hanger & supports equipment in India with technology from support Technology & Products UK. In the year 2000, we signed a joint venture agreement with pipe Supports Group UK to manufacture the pipe Supports range of hangers & supports and upgraded to the latest technology. The company was renamed pipe Supports India (P) Ltd.

2 The joint venture came to an end in Jan 2010 having completed its stipulated 10 year term and the technology was fully absorbed. Present The renamed company, pipe Hangers & Supports (P) Ltd - PHSPL was incorporated in January 2010 with its unique brand identity. We are enhancing the technology and introducing new products in the near future. We use state of the art technology, modern manufacturing methods, latest software, computer systems, CNC machines etc. to deliver a competitive, cost effective high quality product.

3 We are highly focused on timely delivery and on time response to client requirements. We provide after sales support including responding to site emergencies during erection and commissioning. DYNAMIC RESTRAINTS Rigid Strut with Fig RY3 stiff clamp Fig RY4 stiff clamp 162 DYNAMIC RESTRAINTS Fig - 1 pipe work can be subjected to dynamic loading caused by earth quakes, 2 Phase flow, water hammer, safety relief valve opening etc. These are transient events, in most cases un predictable and can cause considerable damage to pipe work, even accidents and loss of life.

4 Pipes are normally supported by Rod hangers or spring hangers with a combination of pipe shoes etc., all subjected to single direction acting loads. Rod hangers are subjected to tensile loads as the pipe is hanging from them. If the pipe moves up then the load acting direction changes from tensile to compression and the rod hangers will immediately buckle and fail. pipe work subjected to dynamic forces and vibration needs to be supported using rigid struts which act in both directions rather than hanger rods which support only downward acting loads.

5 Rigid struts can be used in combination to act like a restraint in 1 or multiple axes. Rigid struts are also used as lateral restraint where this is required. RIGID STRUT TYPE. RS The comprehensive range of Rigid Struts manufactured by pipe Hangers & Supports Private limited covers loadings up to more than 90 Ton force and lengths of up to 6 meters. Provision of spherical bearings on hinge points allow angulation and off centre loadings. The struts are designed to provide a length adjustment at site of 100 mm by use of left hand / right hand threads with out disconnecting from installed position.

6 The easy to use selection process and numbering system allow quick selection of strut size from the load / length chart. Once the size is known selecting the structural welding clevis and pipe clamp is very easy. Where there are length limitations, pipe Hangers & Supports have introduced short length struts with limited field adjustment facility, refer tables for details. WELDING CLEVIS TYPE. RWC The strut is attached to the structure / steel work by use of the welding clevis. The welding clevis (as shown in Fig 1) is capable of providing 5 Degrees and 90 Degress of angulation as shown in the figure.

7 CLAMPS FOR RIGID STRUTS (TYPE RY3, RY4 AND RY5) pipe hangers and Supports offer a wide variety of clamps for rigid struts. The RY3 is a yoke type stiff clamp profiled from a single plate and used in conjunction with a sheathed U-Bolt. The RY4 is again a yoke type stiff clamp, but a double plate stiff clamp with sheathed U Bolt and the axis of the connecting pin is parallel to pipe axis. The RY5 stiff clamp is a conventional 3 bolt type pressed pipe clamp. As the pipe OD can vary due to manufacturing tolerances, use of shim stock between pipe and clamp is advised to result in a positive grip to provide good dynamic restraint.

8 Direction of Loading 10 All the above types of clamps are designed to operate in a 10 Cone of load application and use hardened and ground pins of close tolerance to prevent chattering of pin during vibration. SELECTION RIGID STRUTS Selection of rigid struts is based on the length between pin centers and maximum applied load. The table shows max loading at 1 meter length intervals, for intermediate lengths max loadings can be arrived at by interpolation. If load is not provided, do not select struts.

9 If a minimum stiffness of rigid strut is required, then refer table giving stiffness of struts. The lengths of struts should be such that its within max permitted angulation else resort to cold offset to counter this. SELECTION WELDING CLEVIS Welding clevises are selected to suit the corresponding strut with which it is supposed to be used. For example a Rigid Strut size RS-4 will use welding clevis Size RWC-4. SELECTION pipe CLAMP FOR STRUTS Turn to the page relating to the appropriate pipe size in question.

10 1. From the table find the column relating to clamp maximum temperature just greater than or equal to pipe work temperature. 2. The clamp part nos are designed to easily identify the correct clamp size For Example Fig RY4-200-3-530 means a RY4 yoke type double plate clamp for pipe size NB 200, load group 3 (which is same as the strut load group) and 530 is the maximum operating temperature. STANDARD FEATURES OF RIGID STRUT ASSEMBLIES Eleven standard sizes to choose from. Length adjustment of 100 mm without disconnection.