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. The joint venture came to an end in Jan 2010 having completed its stipulated 10 year term and the technology was fully absorbed.

2 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. 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.

3 The design of the current range of constant effort supports is the result of experience and know how accrued over several decades. The present form and function of the Constant Effort Supports are based on the geometry derived from this know how such that the theoretical deviation of supporting effort as the pipe moves from cold to hot or vice versa is kept to a minimum. By reducing the number of rotating joints and providing maintenance free PTFE based bearings on rotating joints, friction is reduced to an extent where in there is little deviation between theory & practice.

4 Helical coil compression springs play a major role in the performance of supports and engineers at pipe Hangers & Supports have made great efforts to design a compact range of springs capable of delivering the performance demanded of them. They are also designed keeping in mind present trends in plant design with increasing space limitations with smaller head rooms and form factor typical to Power Plants, Process plants, Off shore rigs & marine applications. Other important considerations during design stage are: Effect of spring ageing or fatigue The ambient environment that the supports function in.

5 The needs of the pipe work company to balance lines during erection. The need to revise pre-set loads on hangers due to changes in routing or otherwise that may occur on-site after completion of supplies. Quick and easy locking and un-locking of hangers during operation for undertaking maintenance activities like routine gasket changes, valve replacements etc Such above operations to be carried out with out any special tools and tackles and make do with std tools and tackles already available at site.

6 Structurally rigid to withstand handling prior to erection. Large well readable travel scales and pointers to show actual travel position during operation, visible from a distance. Constant effort supports are complex mechanical leverage systems designed to provide a constant supporting effort as the pipe moves from cold position to hot position or vice-versa. Constant effort supports are normally used for large vertical movements typically more than 50mm to 60mm or when the travel provided by variable effort supports are insufficient.

7 There are certain typical situations where the movements are small but the stress engineer does not want any differential loading to be transferred from pipe to other attached equipment and the result is the use of a constant effort support . The pipe hanger and Supports range of Constant effort supports are based on the Bell Crank Lever mechanism. To very simply illustrate the working idea of a constant effort support consider the sketch below : A pipe is suspended from a wire rope connected to a dead weight by using a pulley mechanism. As the pipe moves up the dead weight moves down and moves up when the pipe moves down.

8 The weight of the pipe is perfectly counterbalanced by the dead weight such that the pipe can be said to be floating, the supporting force remains constant irrespective of movement. The modern Constant effort support using the Bell crank lever mechanism and its geometry and mathematics is illustrated below. The Bell crank lever rotates around the Fulcrum point O . One end of the Bell crank lever is connected to the pipe P1 , the other end is connected to the spring by the tie rod. Thus when the pipe moves down from cold to hot condition, the point P1 moves down, and as it moves down the Bell crank lever will rotate in the anti clock wise direction & tie rod connected to the spring will be pulled in, by which the spring gets further compressed.

9 When the pipe moves up the bell crank lever will rotate (in the clock wise direction) & the tie rod connected to spring will be pushed out thus allowing the spring to expand or relax. By computing moments around the fulcrum point O , we will arrive at the formula: P1 x D = F x d F x d P1 = ------------- D Our purpose is to keep P1 constant the reaction experienced by the pipe as a constant. As the bell crank rotates around the Fulcrum point O , the values of F (the load due to the spring reaction) d & D will change in such a predetermined manner so as to keep value of P1 constant.

10 Theoretically & mathematically the value of P1 will remain constant but due to friction at rotating points, spring hysteresis, manufacturing tolerances, MSS-SP 58 allows a deviation of 6 % on the preset load and BS3974 allows 5%. The formula for calculating the permitted deviation is :- Deviation from Max. Reading moving down Min Reading Moving up Specified Load = ---------------------------------------- -------------------------------- Max. Reading moving down + Min Reading Moving up Our Standard range of Constant effort support units cater to movements upto 750mm and loads upto 50 tons.