5K to 30K Japanese Flange Standards
JIS B2220 Standard Flanges: Dimensions | Specifications | Material Grade | Standards | About JIS B2220 Standard | All Product Types
JIS B2220 is the Japanese Industrial Standard that specifies the dimensions, pressure ratings, and tolerances for steel pipe flanges used in industrial piping systems. These flanges are widely used in industries where Japanese and Asian piping standards are preferred, such as in petrochemical plants, refineries, water treatment systems, shipbuilding, and general mechanical piping projects.
At Nutech Overseas, we manufacture and export high-performance JIS B2220 flanges in pressure classes 5K, 10K, 16K, 20K, and 30K, conforming precisely to standard specifications. Our product range includes JIS Slip-On Flanges (S/O), Blind Flanges (B), Weld Neck Flanges (W/N), Threaded Flanges (T), and Lap Joint Flanges, manufactured using high-grade stainless steel, carbon steel, and alloy steel to ensure reliable performance under diverse industrial conditions.
These flanges are manufactured with strict dimensional accuracy, ensuring smooth bolt-hole alignment, correct raised face (RF) and flat face (FF) configurations, and compatibility with JIS B2220 gaskets. All flanges undergo rigorous quality checks and testing as per industry norms, and we provide dimensional and pressure class documentation with every dispatch to meet international procurement standards.
Our JIS B2220 flanges are available from 15A to 1500A nominal size (½" to 60"), and our machining process ensures adherence to tolerances specified in JIS B2220:2004. These flanges are suitable for ANSI-compliant pipelines as well, where dual standard compatibility is required.
We also provide customization options, surface treatments like anti-rust coating, and global delivery support. Our products are regularly exported to Japan, South Korea, UAE, Vietnam, Malaysia, and other East Asian and Gulf countries, making us a reliable supplier for global JIS-standard piping projects.
For complete technical details, including dimensions, pressure rating classes, weight charts, sizes, tolerances, and material specifications of our JIS B2220 10K Flanges, please download the full Catalog PDF below.
Specification | Details |
---|---|
Standard | JIS B2220 (Japanese Industrial Standard for Steel Pipe Flanges) |
Flange Types | Weld Neck, Blind, Slip-On, Threaded, Lap Joint, Socket Weld |
Pressure Ratings | 5K, 10K, 16K, 20K, 30K |
Size Range | ½″ NB to 48″ NB (DN15 to DN1200) |
Face Types | Raised Face (RF), Flat Face (FF) |
Drilling Template | As per JIS B2220 bolt circle and hole arrangement |
Tolerances | Machined to meet JIS dimensional and flatness tolerances |
Surface Finish | Stock Finish, Smooth Face, Serrated Finish (Spiral/Concentric) |
Testing & Inspection | Hydro Test, Dimensional Inspection, Visual QC, PMI (as per order) |
Certification | EN 10204 3.1 / 3.2, ISO 9001:2015, Third-Party Inspection |
Applications | Shipbuilding, Petrochemical, Refining, Marine, Water Supply, HVAC, Industrial Utilities |
Origin | Made in India (by Nutech Overseas) |
Export Network | USA, Europe, and Middle East |
Material Category | JIS 10K Flange Grades |
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Stainless Steel JIS B2220 Flange | ASTM A182 F304 / F304L / F304H, F316 / F316L / F316Ti, F310, F309S, F317 / F317L, F321 / F321H, F347 / F347H, F904L, ASTM A351 CF3 / CF3M / CF8 / CF8M / CF8C, DIN 1.4301, 1.4306, 1.4307, 1.4311, 1.4401, 1.4404, 1.4408, 1.4409, 1.4541, 1.4571, 1.4550, 1.4435, 1.4539 |
Duplex Steel JIS B2220 Flange | ASTM A182 F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61, UNS S31803 / S32205 |
Super Duplex Steel JIS B2220 Flange | ASTM A182 F53 / F55 / F57 / F59 / F60 / F61, UNS S32750 / S32760 |
Carbon Steel JIS B2220 Flange | ASTM A105 / A105N, ASTM A350 LF2, ASTM A694 F52 / F56 / F60 / F65 / F70 / F80, ASTM A216 WCB, DIN 1.0460 / 1.0402 / 1.0619, Die Steel, Mild Steel |
Alloy Steel JIS B2220 Flange | ASTM A182 F5 / F9 / F11 / F12 / F22 / F91, AISI 4130 / 4140 |
Nickel Alloy JIS B2220 Flange | Nickel 200 / 201, ASTM B564 |
Monel JIS B2220 Flange | Monel 400 (UNS N04400), Monel K500 (UNS N05500), ASTM B564 |
Inconel JIS B2220 Flange | Inconel 600 / 601 / 625 / 690 / 718 / 783 / X750, ASTM B564 |
Incoloy JIS B2220 Flange | Incoloy 800 / 800H / 800HT (UNS N08800), Incoloy 825 (UNS N08825), Incoloy 925, ASTM B564 |
Hastelloy JIS B2220 Flange | Hastelloy C276 (UNS N10276), C22 (UNS N06022), C4, C2000, B2, B3, X, ASTM B564 |
Alloy 20 JIS B2220 Flange | Alloy 20 / 20Cb-3, Carpenter® 20, ASTM B462 |
254 SMO JIS B2220 Flange | SMO 254 / 6Mo, UNS S31254, DIN 1.4547, ASTM A182 |
Copper Nickel JIS B2220 Flange | Copper Nickel 90/10 (C70600), 70/30 (C71500), UNS C71640, ASTM B61 / B62 / B151 / B152 |
Copper JIS B2220 Flange | TP1, TP2, T1, T2, C10100–C12300, C14200–C17200, C21000–C71520, including C10930, C11000, C11400, C12000, C12200, C26000, C28000, C33000, C44300, C70600, etc. |
Brass JIS B2220 Flange | Grades 3602, 2604, H59, H62, etc. |
Aluminium JIS B2220 Flange | Aluminium Grades 5052, 6061, 6063, 2017, 7075, etc. |
Titanium JIS B2220 Flange | ASTM B381 Gr.1 / Gr.2 / Gr.4 / Gr.5 / Gr.7, UNS R50250 / R50400 / R50550 / R50700 / R52400 / R53400 / R56320 / R56400 |
Other Special Grades | Al6XN, Tin Bronze, Aluminium Bronze, Lead Bronze, Nimonic 75 / 80A / 90 |
The “K” in JIS flange pressure ratings stands for kilogram-force per square centimeter (kgf/cm²), which is a traditional Japanese unit of pressure. It defines the maximum allowable pressure the flange can handle under specified conditions.
Here’s a quick breakdown of what the ratings typically correspond to:
These pressure classes are vital in selecting the correct flange for different temperature, media, and application environments, especially in marine and shipbuilding industries where JIS standards are commonly used.
JIS B2220 flanges are manufactured with specific face types to ensure proper sealing and compatibility with piping systems. The most commonly used face types include:
This is the most widely used face type in JIS flanges, especially in low-pressure applications such as 5K and 10K. It ensures full gasket contact and uniform pressure distribution.
Found mostly in higher pressure classes like 16K and above, RF flanges provide better sealing by concentrating pressure on a smaller gasket area.
Although rare in JIS B2220, these specialized faces are used where additional sealing security is needed and can be provided on custom order.
Proper selection of the face type is crucial for gasket compatibility, leak prevention, and compliance with system requirements.
JIS B2220 flanges are manufactured in various materials to meet the requirements of pressure ratings (5K to 30K), application environments, and fluid compatibility. The most commonly used materials include:
These materials are selected as per application needs and are fully compliant with JIS standards. Each material offers specific mechanical and chemical properties to suit piping systems operating under different conditions.
JIS B2220 flanges are manufactured with strict dimensional tolerances and inspection standards to ensure proper fitment and pressure integrity in piping systems. These include:
These tolerances and quality checks are critical for ensuring leak-proof operation in high-pressure Japanese industrial systems like shipbuilding, chemical, and thermal plants.
The JIS B2220 flange standard, developed for Japanese industrial applications, differs in multiple aspects from international standards like ASME B16.5 (USA) and EN 1092-1 (Europe). Here's a technical comparison:
Feature | JIS B2220 | ASME B16.5 | EN 1092-1 |
---|---|---|---|
Pressure Ratings | 5K, 10K, 16K, 20K, 30K | Class 150, 300, 600, 900, 1500, 2500 | PN6, PN10, PN16, PN25, PN40, PN63, PN100, PN160, PN250, PN400 |
Application Regions | Primarily Japan & Asia-Pacific | North America, Middle East | Europe & Global Projects |
Common Face Types | Flat Face (FF), Raised Face (RF) | RF, RTJ | Type A, B, C, D (RF/FF/RTJ) |
Drilling Template | JIS-specific, not interchangeable | ANSI B16.5 standard drilling | EN standard drilling (e.g., ISO 7005-1) |
Flange Thickness & Weight | Generally thinner, lighter for low-pressure systems | Heavier and thicker for high-pressure classes | Moderate to heavy, depends on PN class |
Gasket Compatibility | Compressed fiber, spiral wound, metal gaskets | Spiral wound, ring-type joint (RTJ) | Type IBC gaskets, EN-gasket types |
Conclusion: Interchangeability is not guaranteed. Always match flange standards to piping system design codes to ensure safety and compliance.
JIS B2220 flanges are widely used across various industries in Japan and many Asia-Pacific countries due to their compatibility with regional standards and operational efficiency. These flanges are commonly preferred in:
Why they are preferred: