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Overview
JIS B2220 Blind Flanges are solid plate flanges manufactured in accordance with the Japanese Industrial Standard JIS B2220, designed to close the end of a piping system, valve, or pressure vessel opening.
With no central bore, blind flanges provide a reliable pressure seal and allow for future expansion, inspection, or maintenance of pipeline systems.
These flanges are widely used in water supply, fire protection, oil & gas, petrochemical, power generation, and industrial piping systems, especially in projects following Japanese and Asian standards.
A JIS B2220 Blind Flange is a round, solid steel plate with precision-drilled bolt holes that match mating JIS flanges of the same pressure rating.
Standard: JIS B2220
Type: Blind Flange (BL / BF)
Pressure Ratings: 5K, 10K, 16K, 20K, 30K
Size Range: DN10 – DN1500
Facing Type: Flat Face (FF) or as specified
Manufacturing Process: Forged or Plate-Cut, CNC Machined
Carbon Steel: SS400, Q235, A105 (or equivalent)
Stainless Steel: SUS304 / 304L / 316 / 316L
Other alloys available upon request
Anti-rust oil
Black painting
Yellow painting
Hot-dip galvanized (optional)
| Model Number: | JIS B2220 Blind Flanges |
| Standard: | ANSI, BS, DIN, EN, JIS, ASME, |
| Product name: | BLIND Flange |
| Material: | Q235 /A105/ ST37/S235JR/ CT20 /SS400/16MN/SS321/SS304/SS316/S235/P245GH/P250/P91/904L |
| Pressure: | 5K, 10K, 16K, 20K, 30K |
| Technics: | Forged |
| Connection: | Welding |
| Surface Antirust: | Antirust light oil、 Black paint coating、Yellow paint coating or Red paint coating、Galnavized (Hot galvanized or Cold galvanized or Electro Galvanized) |
| Certificate: | ISO, CE, PED, BV, KS |
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Flange production process
Factory Showcase
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FAQ
Q1: What is the purpose of a JIS B2220 blind flange?
A blind flange is used to seal the end of a pipeline or equipment connection, preventing fluid flow while allowing future access.
Q2: Can JIS B2220 blind flanges be used permanently?
Yes. They can be used for both temporary isolation and permanent pipeline closure, depending on design requirements.
Q3: What is the difference between JIS blind flanges and ASME blind flanges?
They differ in dimensions, bolt circle, thickness, and pressure rating systems. JIS flanges are not directly interchangeable with ASME flanges.
Q4: How do I choose the correct pressure class (5K, 10K, 20K)?
Select the pressure class based on system design pressure, operating temperature, and safety factors.
Q5: Are custom sizes or coatings available?
Yes. Custom dimensions, materials, coatings, and markings can be supplied upon request.
