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Composite Flange GB Standard

Composite Flange GB Standard

FRP/PVC-C, FRP/PVC-U Fiberglass Reinforced Plastic Coated Flange

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App Temperature Bound List
Material        Medium temperature℃ Material Medium temperature℃
PVC-C -20℃~+95℃ PVC-U -5℃~+45℃
FRPP -20℃~+120℃ PPH -20℃~+110℃
PVDF 40℃~+150℃

Product Structural Features

1. Lightweight and High-Strength
The relative density is between 1.5 and 2.0, only 1/4 to 1/5 that of carbon steel, yet its tensile strength approaches or even exceeds that of carbon steel, and its specific strength is comparable to that of high-grade alloy steel.
2. Excellent Corrosion Resistance
FRP is an excellent corrosion-resistant material, offering excellent resistance to air, water, moderate concentrations of acids, alkalis, salts, and various oils and solvents.
3. Excellent Electrical Properties
FRP is an excellent insulating material used in insulators. It maintains good dielectric properties even at high frequencies and has excellent microwave transmittance.
4. Excellent Thermal Properties
FRP has low thermal conductivity and is The thermal conductivity is 1.25-1.67 kJ/s, only 1/100-1/1000 of that of metal, making it an excellent thermal insulation material.
5. Excellent Designability
Flexible design of various structural products to meet specific application requirements, ensuring excellent product integrity and enabling the selection of materials to meet product performance requirements.
6. Excellent Manufacturability
Flexible molding technology can be selected based on product shape, technical requirements, application, and quantity. The process is simple, allows for one-step molding, and offers excellent economic benefits. This is particularly advantageous for complex, challenging, and low-volume products, highlighting its superior processability.

Composite Flange

DN D1 D2 D3 D4 d1 d2 H h Z S n-Φ
0.6MPa 1.0MPa 1.6MPa
15  30  65  70  95  20  17  20  14  16  12    14  16  4-Φ15X20
20  36  70  75  105  25  22  23  16  19  12    14  16  4-Φ15X18
25  46  79  90  120  32  28  27  16  22  12    14  18  4-Φ16X22
32  53  89  100  140  40  36  31  17  26  12    16  18  4-Φ18X24
40  64  98  110  150  50  45  36  19  31  12    18  20  4-Φ18X25
50  77  120  125  165  63  58  43  21  38  15    18  20  4-Φ18X21
65  92  140  145  185  75  69  50  22  44  18    20  25  4-Φ18X21
80  108  150  160  200  90  84  57  25  51  18    20  25  8-Φ18X24
100  131  175  190.5  225  110  104  67  28  61  18    20  25  8-Φ18X26
125  160  210  216  250  140  134  82  30  76  18    25  30  8-Φ20X22
150  180  240  242  280  160  154  92  30  86  18    25  30  8-Φ23X24
200(PN10) 253  290  295  338  225  219  125  35  119  20    30  35  8-Φ23X27
200(PN16) 249  — 295  340  225  219  125  28  119  20    30  35  12-Φ23
250  310  350  362  406  280  254  153  30  146  25    35  40  12-Φ25X31
300  348  400  432  483  315  300  174  30  164  25    35  45  12-Φ25X41
350  393  460  470  520  355  348  197  35  184  30    40  50  16-Φ22X27
400  440  515  525  580  400  390  218  35  206  30    40  60  16-Φ26X31
450  494  561  589  640  450  430  243  40  231  35    45  65  20-Φ26X36
500  548  620  650  715  500  480  271  40  256  35    50  70  20-Φ26X41
600  692  725  780  840  630  571  506  42  321  40    55  75  20-Φ30X58

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About Us
Kaixin Pipeline Technologies Co., Ltd.
Kaixin Pipeline Technology Co., Ltd., founded in 1999, is a high-tech enterprise integrating R&D, manufacturing, sales, and services. It has been recognized as a National-level Key Cultivation Enterprise for "Specialized, Sophisticated, Differential and Innovative" Little Giants, a National-level Key Cultivation Enterprise for "Single Champions," a Provincial Sci-Tech SME, a Ningbo Municipal "Specialized, Sophisticated, Differential and Innovative" SME, a Municipal Key Cultivation Enterprise for "Single Champions," a Municipal Polymer Pipe and Valve Technology R&D Center, a District Green Factory, a Municipal Enterprise Management Innovation (Four-Star) Enterprise, and a Data Management Capability Maturity (Level 2) Enterprise.
As a famous China Composite Flange GB Standard Suppliers and Composite Flange GB Standard Factory, the company specializes in the R&D, production, and sales of non-metallic chemical anti-corrosion products, including plastic valves, plastic pipes, plastic fittings, and corrosion-resistant pumps. Its material portfolio covers PVC‑C, PVC‑U, PVDF, PPH, and FRPP, offering a comprehensive range of products and specifications. The maximum diameter for butterfly valves reaches DN1000, while pipes and fittings can be manufactured up to DN800. Leveraging its municipal‑level technology R&D center, Kaixin has achieved full-process control from raw material selection and automated production to final product inspection. Its products are widely applied in corrosive environments across industries such as chemical processing, electroplating, and environmental protection, meeting customers' specific requirements for large diameters, temperature resistance, pressure resistance, and other special conditions.
Kaixin steadfastly follows the development philosophy of "technology‑driven and in step with the times," investing nearly ten million yuan annually in R&D. Through automated standardized production and strict selection of imported raw materials, the company ensures consistent product quality. Guided by its foreign trade development strategy, Kaixin keeps close to market trends and leverages the "Internet+" model to promote "Made in China" on the global stage.
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