HG/T 4372-2012 (English Version) PDF

Scope: This standard specifies the terms and definitions, raw materials, technical requirements, inspection methods, inspection rules, product marking and transportation of composite pipes and fittings for chemical industry (hereinafter referred to as pipes and fittings). This standard applies to fiberglass pipes and fittings that use glass fiber as reinforced material, unsaturated polyester resin or vinyl resin as the matrix, low-pressure contact molding or fiber winding molding. The pressure level is not greater than 2.5 MPa, and the design temperature is not greater than 150°C (when the design temperature exceeds 110°C, the design safety factor should be appropriately increased, and the safety factor can be agreed upon by both the supplier and the buyer). This standard does not apply to FRP pipes and fittings made of epoxy resin, phenolic resin or furan resin, nor to FRP pipes and fittings made by centrifugal casting, molding or pultrusion.

HG/T 4372-2012 Referenced Document

GB 13115 Hygienic standard of unsaturated polyester resin and glass fibre reinforced plastics used as food containers and packaging materials
GB/T 1447 Fiber-reinforced plastics composites---Determination of tensile properties
GB/T 17470 Glass fiber mats—Chopped strand and continuous filament mats
GB/T 18369 Glass fiber roving*， 2022-10-14 Update
GB/T 18370 Glass fibre woven roving*， 2014-12-05 Update
GB/T 2576 Test method for insoluble matter content of resin used in fiber reinforced plastics
GB/T 2577 Test method for resin content of glass fiber reinforced plastics
GB/T 3854 Test method for hardness of reinforced plastics by means of a Barcol impresser*， 2017-09-07 Update
GB/T 5349 Fiber-reinforced thermosetting plastic composites pipe-Determination of longitudinal tensile properties
GB/T 5351 Fiber-reinforced thermosetting plastic composites pipe-Determination of short-time hydraulic failure pressure
GB/T 8237 Liquid unsaturated polyester resin for fiber reinforced plastics