This standard specifies the nominal pressure, nominal diameter, specifications and dimensions, connection structure, technical conditions, inspection, marking, packaging, transportation and storage of polypropylene/glass reinforced plastic (PP/FRP) composite pipes and fittings. This standard applies to composite pipes and fittings with polypropylene pipe as inner lining and reinforced plastic glass reinforced plastic wrapped with glass fiber or its fabric as reinforcement layer. The range of use media is the same as that of polypropylene pipe, mainly used for conveying corrosive media such as acid, alkali, salt, etc., and can also be used for conveying drinking water. HG/T 21579-1995 Polypropylene/glass reinforced plastic (PP/FRP) composite pipes and fittings HG/T21579-1995 Standard download decompression password: www.bzxz.net

Document of the Ministry of Chemical Industry
Chemical Construction Development (1995) No. 392
Notice on Issuing the Chemical Industry Standard "Polypropylene/Glass Fiber Reinforced Plastic (PP/FRP) Composite Pipes and Fittings" To all provincial, autonomous region, municipality directly under the Central Government, and independently planned cities, and all relevant design units: The "Polypropylene/Glass Fiber Reinforced Plastic (PP/FRP) Composite Pipes and Fittings" formulated by the Process Piping Design Technology Center of our Ministry has been reviewed and approved as a recommended chemical industry standard, numbered HG/T21579-95. It will be implemented from September 1, 1995. The Process Piping Design Technology Center of our Ministry is responsible for the management of this standard; the Engineering Construction Standard Editing Center of our Ministry is responsible for publishing and issuing it.
Ministry of Chemical Industry
May 30, 1995
Industry Standard of the People's Republic of China
Polypropylene/glass fiber reinforced plastic (PP/FRP)
Composite pipes and fittings
HG/T 21579-95
Editor: Process Piping Design Technology Center of the Ministry of Chemical Industry Approved by: Chemical Industry
Implementation date: September 1995
Engineering Construction Standard Editing Center of the Ministry of Chemical Industry
Subject content and scope of application·
2 Reference standards
Nominal pressure and nominal diameter:
Specifications, dimensions and connection structure of PP/FRP composite pipes and fittings 3
Technical conditions
Inspection*
Marking, packaging, transportation, storage
Preparation instructions
(1)
+*ie++* (3)
(4))
(32)
...(39)
Subject content and scope of application
1.0.1 This standard specifies the nominal pressure, nominal diameter, specifications and dimensions, connection structure, technical conditions, inspection, marking, packaging, transportation and storage of polypropylene/glass reinforced plastic (PP/FRP) composite pipes and fittings. 1.0.2 This standard applies to composite pipes and fittings with polypropylene pipe (hereinafter referred to as PP pipe) as inner lining and reinforced plastic glass reinforced plastic wrapped with glass fiber or its fabric as reinforcement layer (hereinafter referred to as FRP). The medium range is the same as that of polypropylene pipe, mainly used for conveying corrosive media such as acid, alkali, salt, etc., and can also be used for conveying drinking water. SG:246
GB1033
GB1036
《Polypropylene pipe》
《Equal length stud bolt》
Reference standard
《Plastic density and relative density test method》《Plastic linear expansion coefficient test method》
GB 1450.1
《Glass fiber reinforced plastic interlaminar shear strength test method》GB2576
GB2577
GB3854
GB5349
GB5350
GB5351
GB6112
GB6170
GB8237
GB8805
GB9121
DIN 16965
Test method for insoluble content of fiber reinforced plastic resins, Test method for resin content of glass fiber reinforced plastics, Test method for Barcol hardness of fiber reinforced plastics, Test method for axial tensile properties of fiber reinforced thermosetting plastic pipes, Test method for axial compression properties of fiber reinforced thermosetting plastic pipes, Test method for short-term water pressure failure pressure of fiber reinforced thermosetting plastic pipes, Test method for impact resistance of thermoplastic plastic pipes and fittings (drop hammer method), Nuts
Liquid unsaturated polyester resin for glass fiber reinforced plastics (FRP), Determination method for bending of rigid plastic pipes, Compilation of national standards for steel pipe flanges
"Dimensions of Type B of Wound Glass Fiber Reinforced Polyester Resin (UP-GF) Pipe" DIN16966 "Fittings and Joints of Glass Fiber Reinforced Polyester Resin (UP-GF) Pipes" ISO161/1
"Nominal Outside Diameter and Nominal Pressure of Thermoplastic Pipes for Fluid Transportation"
3 Nominal Pressure and Nominal Diameter
3.0.1 Nominal Pressure: PNo.6, 1.0 and 1.6MPa3.0.2 Nominal Diameter: DN15, 20, 25, 32), 40, 50, 65, 80, 100, (125), 150, 200, 250, 300, 350, 400450.500 and 600mm.
Use Temperature: 15~100℃.
3.0.4 See Table 3.0.4 for the allowable use pressure at various temperatures. If there are special requirements, the supply and demand parties shall negotiate to resolve them. Permissible operating pressure of polypropylene/FRP composite pipes at various degrees of decline (MIPa) Nominal pressure
Nominal diameter
65~150
200～300
350600
65~150
200~300
350~600
65~150
200-300
350~~600
Permissible operating pressure at the following temperature (C), MPa80
Specifications, dimensions and connection structures of PP/FRP composite pipes and fittings 4.1 Pipes
Specifications and dimensions of straight pipes are specified in Table 4.1.1. 30°bzxZ.net
FRP layer
Interface adhesive
L40006000
'sas+s
Turning agent
4.1.2 The dimensions of FRP reinforcement structure for PP pipe butt welding are specified in Table 4.1.2. Interface adhesive
FRP layer
o't Nd
Thickness at pipe
Thickness at pipe
Specifications and dimensions of bell and spigot pipes are specified in Table 4.1.3. 4.1.3
L4000~-6000
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