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: PVC-U is only 1/10 the weight of cast iron, making it easy to transport and install, reducing costs.
2. Superior Chemical Resistance: PVC-U has excellent resistance to acids and alkalis, with the exception of strong acids and alkalis near their saturation point.
3. Durable: PVC-U offers excellent weather resistance and is resistant to corrosion by bacteria and fungi.
4. Non-conductive: PVC-U is non-conductive and is not susceptible to corrosion by electrolysis or electric current, eliminating the need for secondary processing. It is non-flammable and does not support combustion, eliminating fire safety concerns.
5. Low resistance and high flow rate: The smooth inner wall minimizes fluid flow loss, and dirt is less likely to adhere to the smooth pipe surface, making maintenance simple and cost-effective.
6. Easy Installation and Low Cost: Cutting and joining are simple. PVC glue has proven to be safe, reliable, easy to use, and cost-effective.

PVC-U Blind Flange

DN D d1 d2 t n-Φ
15  95  70  60  14  4-Φ15X20
20  105  75  70  18  4-Φ15X17.5
25  125  90  79  18  4-Φ15X20.5
32  140  100  89  20  4-Φ18X23.5
40  150  112  98  20  4-Φ18X25
50  165  127.5  120  20  4-Φ18X21.75
65  185  148  140  20  4-Φ18X22
80  200  163  150  20  8-Φ18X24.5
100  229  195  175  22  8-Φ18X28
125  254  220  210  22  8-Φ18X23
150  285  246  240  24  8-Φ22X25
200(PN10) 347  305  295  32  8-Φ23X28
200(PN16) 341  296  32  12-Φ22
250  406  369  350  34  12-Φ23X32.5
300  445  400  40  12-Φ23
350  505  460  40  16-Φ23
400  570  515  40  16-Φ27
450  625  565  38  20-Φ26
500  670  620  40  20-Φ27
600  800  740  720  50  20-30X40
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About Us
Kaixin Pipeline Technologies Co., Ltd.
Founded in 1999, Kaixin Pipeline Technologies Co., Ltd. is a high-tech enterprise integrating R&D, manufacturing, sales, and service. As a famous China PVC-U Blind Flange DN15-600 GB Standard Suppliers and PVC-U Blind Flange DN15-600 GB Standard Factory, the company holds multiple prestigious certifications, including National High-Tech Enterprise, “Little Giant” Specialized and Sophisticated SME, National Single Product Champion (Cultivation), Provincial Technology-based SME, Ningbo Specialized and Sophisticated SME, Ningbo Single Product Champion (Cultivation), Ningbo Polymer Pipe & Valve Technology R&D Center, District-Level Green Factory, Ningbo Four-Star Management Innovation Enterprise, and Enterprise Data Management Capability Maturity Level 2.
We specialize in developing, producing, and supplying non-metallic corrosion-resistant products for chemical applications, including plastic valves, pipes, pipe fittings, and corrosion-resistant pumps. Our product portfolio spans materials such as PVC-C, PVC-U, PVDF, PPH, and FRPP, with a comprehensive range of types and specifications. Notably, our butterfly valves can reach DN1000 in diameter, while pipes and fittings extend up to DN800, addressing market gaps and maintaining our competitive edge in the industry.
Guided by the principle of “Technology-Driven, Keeping Pace with the Times,” Kaixin allocates nearly RMB 10 million annually to R&D. We ensure superior product quality through standardized automated manufacturing and strict sourcing of imported raw materials. Aligned with our international development strategy, we continuously monitor global market trends and leverage digital channels to bring high-quality “Made in China” products to customers worldwide.
Ningbo • Fenghua R&D & Production Base
With a total investment of RMB 200 million, Kaixin Ultra-Pure Pipe Technology (Ningbo) Co., Ltd. has established a new materials laboratory in collaboration with universities and research institutes, built a modern manufacturing base, and installed 8 fully automated production lines for modified plastics and 8 for polymer materials. The facility is dedicated to the R&D, production, and application of new modified plastics and polymer materials. Kaixin is also committed to attracting top talent across disciplines, continuously driving product innovation and brand development, with the goal of becoming a globally recognized leader in the R&D and manufacture of polymer valves, pipes, and fittings.
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