Revised Standard from Last Update.

1. Scope

1.1 This Indian Standard specifies general requirements, performance rating, testing and documentation of driers and filter driers manufactured using solid desiccant designed for use in the liquid line of refrigeration systems employing HFC and HCFC refrigerants conforming to IS 16656/ISO 817 having atmosphericboiling point lower than 20 °C.

1.2 This Indian Standard applies to driers and filter driers with threaded, welded or brazed connectors as a part of the first circumferential joint connecting pipingor other elements of refrigeration system.

1.3 This Indian Standard applies to all driers and filter driers with an internal pressure down to – 100 kPa (– 1 bar), to account for the evacuation prior to charging with refrigerant.

1.4 This Indian Standard applies both mechanical and thermal loading conditions as defined in IS 16678/ISO 5149 (Part 1 to 4) applicable for refrigeration systems. Products designed to this standard should have maximum design temperaturenot exceeding 200 °C and a maximum pressure not exceeding 16 000 kPa (160 bar). Outside of this limit it is important that IS 2825 is to be used for design,construction and inspection of pressure vessels. The products complying with this Indian Standard usedin refrigeration systems and heat pumps comply with all other relevant clauses from IS 16678/IS 5149 (Parts 1 to 4).

1.5 This Indian Standard applies to pressure vessels where the main pressure bearing parts are manufactured from metallic ductile materials.

1.6 The subject of filtration is considered separate and distinct from the consideration of this standard. Therefore, the performance and rating of a drier is on the premise of a clean drier and clean refrigerant.

1.7 Driers incorporating a monolithic core as the desiccant are also covered in the scope of this standard.

1.8 The products not covered under this standard are:

a) Vessels of riveted construction; and

b) Multilayered, hydro formed or pre-stressed vessels.