Some standard content:
Industry Standard of the People's Republic of China
HG/T21633-1991
Glass Fiber Reinforced Plastic Pipes and Fittings
1991-09-01
1992-01-01
Ministry of Chemical Industry of the People's Republic of China
Industry Standard of the People's Republic of China
Glass Fiber Reinforced Plastic Pipes and Fittings
HG/T 21633-1991
Proposed by the Chemical Process Piping Design Technology Center of the Ministry of Chemical Industry, compiled by Shanghai Pharmaceutical Design Institute
Approved by the Ministry of Chemical Industry Foreword
According to the arrangement of the Infrastructure Department of the Ministry of Chemical Industry, the Chemical Process Piping Design Technology Center of the Ministry of Chemical Industry organized the compilation of "Glass Fiber Reinforced Plastic Pipes and Fittings" (HG/T21633-1991) as a ministerial industry standard to guide the design and manufacture of process piping. This standard stipulates the design and manufacturing technical requirements of glass fiber reinforced plastic pipes and fittings. The contents include: scope of application, reference standards, regulations, technical requirements for pipes and pipe fittings, inspection, marking, packaging, transportation, storage and appendix, etc. This standard was prepared by Shanghai Pharmaceutical Design Institute. The chief editor is Gong, the reviewer is Xue Peili, the reviewer is Dai Jihuang, Yu Shunzu, Feng Shuyuan, Xia Dewei, and the technical center of chemical process piping design of the Ministry of Chemical Industry. During the implementation of this standard, if there are any modifications or supplements, please provide your opinions and relevant information to the technical center of chemical process piping design of the Ministry of Chemical Industry for reference in future revisions.
Chemical Process Piping Design Technology Center, Ministry of Chemical Industry November 1991
Scope of application
Cited standards
General provisions
3.1 Design pressure and design temperature of FRP pipes and fittings 3.2 Product structure, tailor/terminal, pressure, thickness and mechanical properties 4
Pipes and fittings
Technical conditions
.Products
Inspection of raw materials.
Product appearance quality inspection
Resin curing degree inspection
Resin content inspection
Product mechanical properties inspection
Short-time water pressure failure test
Water pressure test
Marking, packaging, transportation, storage
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Appendix 1
Corrosion resistance of bisphenol A polyester glass fiber reinforced plastic
Appendix 2 Flange connection dimensions.
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1 Scope of application
1.1 This standard applies to FRP pipes and fittings manufactured by low-pressure contact molding and long fiber winding molding.
: 1.2 In this standard, low-pressure contact molding is a method of single-sided pressureless or low-pressure molding, and also includes winding methods such as textiles, non-woven fabrics and felts under low pressure, but does not include compression molding and semi-finished molding methods and their products. 7.3 This standard is based on a combination of glass fiber and unsaturated thermoplastic resin, but other materials can also be used.
2 Reference standards
GB3854 "Fiber reinforced plastic Barcol hardness test method" GB2576 "Fiber reinforced plastic resin insoluble content test method" GB2577 "Glass fiber reinforced plastic resin content test method" JC 281
《Alkali-free and glass fiber-free cloth》
GB9115《Flat-surface butt-welded steel pipe flange》GB1416《General principles for test methods for properties of fiber-reinforced plastics》GB1447《Test method for tensile strength of glass fiber-reinforced plastics》GB1449《Test method for bending strength of glass fiber-reinforced plastics》《Test method for axial tensile properties of fiber-reinforced thermoplastic pipes》GB5349
GB5350
GB5351
《Test method for axial compression properties of fiber-reinforced thermosetting plastic pipes》
《Test method for water positive head pressure of fiber-reinforced thermosetting plastic pipes》
《Test method for axial compression properties of fiber-reinforced thermosetting plastic pipes》 Liquid unsaturated polyester resin GB8237
3 General provisions
3.1 Design pressure and design temperature of FRP pipes and fittings (Note) Design pressure:
Low-pressure contact molded pipe: ≤0.6MPa. Filament winding molded pipe, ≤1.6MPa. Fittings, ≤1.6MPa.
Design saturation, ≤80℃
Note: If this specification is exceeded, please consult with the manufacturer when ordering. 3.2 Product structure, cross-section, end, connection, thickness and mechanical properties 3.2.7 Lining layer
The lining layer is a resin-rich layer with a resin content between 6595% and a thickness of 1.5~2.5mm.
The lining layer can be The overlap of the inner lining layer made of glass fiber felt, synthetic fiber or other suitable materials shall not be less than 50mm3.2.2 Intermediate layer
The resin content of the intermediate layer is the lowest
Low-pressure contact molding, 50±5%
Winding molding, 40±5%
When low-pressure contact molding, the overlap seams between the layers must be staggered, and the overlap width should not be less than f25mmo
3.2.3 Surface layer
The surface layer is generally a weather-resistant layer made of resin with a thickness of 0.5~1.0mm. 3.2.4 One end of the surface
The cross section/end must be sealed with resin, the fibers must not be exposed, and the holes must be filled with resin.
Connection The joint part should be flat and must be processed into a continuous multi-layer bonding structure. At the same time, it should also have the same strength as the material to be joined. The minimum width of the first layer is 50mm, and the second layer begins to gradually increase. With the joint part as the center, the final width of the multi-layer bonding must meet the specified minimum value, see Table 4-3-10. 3.2.6 Thickness of the product
Minimum thickness of the product: low-contact molding shall not be less than 5.0mm, and filament winding molding shall not be less than 4.5mm. The fan thickness can be 80% of the specified wall thickness. See Table 4-1-1-~2, Table 4-2-1
Mechanical properties
The mechanical properties of FRP products formed by low-pressure contact molding shall not be lower than those specified in Table 3-2-1.
Qiu 3-2-1
(mm）
6,6~10
Mechanical properties of low-pressure contact molded FRP products Tensile strength
MPa（kgicmt)
≥61.8(630)
232.4(840)
293.2(950)
21n7.9(1100)
Li Qu length
MPa (kgfeme)
107.9(1100)
2127.5(1301)
2137.3(1400)
3147（15mm）
Morper elasticity:
MPa(kgfciaz)
0.48(4.9)X101
0.55(5.5)×104
2).62(6.3) × 104
3.69(7 ) × 10t
The physical and mechanical properties of filament fiberglass products should not be lower than the requirements of table 3-2-2.
Table 3-2-2
Mechanical properties of filament wound FRP productsAnnular tensile strength, MPa (kgfcm2)
Annular elastic modulus, MFa (kgfem)
Axial tensile strength, MPa (kgfcm2)
Axial elastic modulus: MPa (kgEcm2)
Compressive strength, MPa (Egfcm2)
≥284 (3000)
24517 (250000)
2≥147 (1500)
122500 (125000)
235 (2400)
Note: If the physical and mechanical properties of the product are higher than those listed in Table 3-2-1 and Table 3-2-2, their values can also be used for calculation.
4 Pipes and fittings
4.1 Pipes
4.1.1 Nominal diameter
The nominal diameter of the pipe is expressed by the inner diameter, which is divided into 50, 80, 100, 150, 200, 250.350.400.450500.600.700.800.900 and 1000mm.4.1.2 Length
The length of the pipe is 4000mm, 5000mm and 12000mm. 4.1.3 Thickness
Thickness of pipe, low pressure contact molding, see Table 4-1-1. Filament winding molding, see Table 4-1-2.
Table 4-1-7
Nominal diameter
Minimum wall thickness of low pressure contact molding pipe
Original thickness under internal pressure
Note: This table is based on the mechanical properties listed in Table 3-2-1. If the mechanical properties of the product are different from those listed in Table 3-2-1, this table is not applicable.
4-1-2
Nominal diameter
Minimum wall thickness of filament winding pipe
Note: This table is based on the mechanical properties listed in Table 3-2-2. If the mechanical properties of the product are different from those listed in Table 3-2-2, this table is not applicable.
4.2 Pipe fittings
The nominal diameter of pipe fittings shall be consistent with the nominal diameter of corresponding pipes. Pipe fittings include 90° reducers, 45° elbows, tees and reducers. Table 4-2-1, Table 4-2-2 and Figure 4-2-1 list the dimensions and drawings of 90° reducers, 45° elbows, tees and reducers. Pipe fittings shall have at least the same strength as the pipes to which they are connected. The strength of the connection shall be at least the same as the strength of the pipes to which they are connected. Table 4-2-1
Nominal diameter
GRP 90° elbows, 45° elbows and tees
Minimum wall thickness under various pressures
Note: (1) The minimum wall thickness of pipe fittings with design pressures of 0.25MPa and 0.4MPa can refer to the corresponding pipe thickness. (2) The thickness of the products in the table is the thickness of the low-pressure contact molding method. 7
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