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UPVC Blind Flange

A solid blind flange with no center bore for sealing flanged pipe ends.

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Product Overview

UPVC blind flange for sealing flanged pipe ends. Manufactured from virgin PVC-U compound per GB/T 10002.2 and ISO 1452, this UPVC blind flange has a solid center disc with no bore, bolting directly to a mating flange to close off the line. Available in DN 50 - 400 mm with PN6 - PN16 ratings.

Quick Information

  • Type: Blind Flange
  • Material: PVC-U / PVC-C
  • Size: DN 50 - 400 mm
  • Pressure Rating: PN6 - PN16
  • Connection: Flanged
  • Standard: GB/T 10002.2 / ISO 1452
  • Stock: In stock

Specification Table

Size DN Dimensions (mm) Nominal Pressure

PN(kg/cm²)

D0 d1 da H Number of bolt hole n
15(20) 95.00 65.00 14.00 12.50 4 PN16
20(25) 105.00 75.00 14.00 13.40 4 PN16
25(32) 115.00 85.00 14.00 14.00 4 PN16
32(40) 140.00 100.00 18.00 14.40 4 PN16
40(50) 150.00 110.00 18.00 16.40 4 PN16
50(63) 165.00 125.00 18.00 16.20 4 PN16
65(75) 185.00 145.00 18.00 17.50 4 PN16
80(90) 200.00 160.00 18.00 18.00 8 PN16
100(110) 220.00 180.00 18.00 22.00 8 PN16
125(140) 250.00 210.00 18.00 27.00 8 PN16
150(160) 285.00 240.00 22.00 28.00 8 PN16
200(225) 340.00 295.00 22.00 29.50 8 PN10
250(280) 405.00 350.00 22.00 33.00 12 PN10
300(315) 445.00 400.00 22.00 31.50 12 PN10
350(355) 510.00 450.00 24.00 40.00 16 PN10
400(400) 570.00 500.00 27.00 33.00 16 PN10
500(500) 670.00 620.00 27.00 45.00 20 PN10
600(630) 813.00 725.00 30.00 53.00 20 PN10

Key Features

  • Pressure-Rated Seal: The UPVC blind flange carries full line pressure at the closed end with no leakage path.
  • Machined Sealing Face: The flange face of every UPVC blind flange is machined flat for uniform gasket compression.
  • Chemical Resistance: The UPVC blind flange withstands acids, alkalis and industrial chemicals without corrosion.
  • Lightweight Installation: Far lighter than steel blind flanges, the UPVC blind flange reduces handling cost.
  • PN6 - PN16 Rated: The UPVC blind flange matches common PVC-U pipe pressure classes from DN 50 to 400 mm.
  • Long Service Life: Non-rusting, non-scaling UPVC blind flange material delivers decades of reliable closure service.

Production

Raw Material

Each UPVC blind flange is injection molded from virgin PVC-U compound with precision tooling per GB/T 10002.2 and ISO 1452.

Molding Process

The UPVC blind flange is injection molded with a solid disc face, then CNC machined for flat gasket seat and bolt hole accuracy.

Quality Control

Every UPVC blind flange is inspected for face flatness, bolt circle diameter and pressure rating before packing.

Applications

  • Dead-end lines use the UPVC blind flange to close off sections that will be extended later.
  • Pressure testing crews install the UPVC blind flange to seal pipe ends during hydrostatic tests.
  • Staged construction projects rely on the UPVC blind flange to cap phase boundaries safely.
  • Chemical plants choose the UPVC blind flange for permanent closure of branch lines.
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