6. JIS flange standard

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JIS B2220 5K Flanges

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Description

JIS B2220 5K Flanges

Standard : JIS B2220
Nominal pressure : 5K (5 kgf/cm²)
Size : Usually from 10A to 600A
Materials : Carbon steel, stainless steel, and other alloys
Flange type :
- Slip-on Flanges (SO)
- Blind Flanges (BL)
- Weld Neck Flanges (WN)
- Socket Weld Flanges (SW)
- Threaded Flanges (TH)

Applications

JIS B2220 – 5K Flanges are widely used in piping systems and equipment in industries such as:

Oil and Gas
Chemistry
Oil factory
Thermal power plants
Purify water factory
Marine industry
Build the infrastructure

They are commonly used to connect pipes to equipment or to other pipes, making it easy to disassemble and maintain the piping system.

Standards

JIS B2220 : This is a Japanese standard that specifies the technical requirements, dimensions, and materials for flanges used in piping systems.

5K Rated Pressure: Rated pressure is 5 kgf/cm². Determined to ensure safety and performance in specific applications.

Size: Usually from 10A to 600A (DN10 to DN600). Clearly specified in JIS B2220 standard.

Material:

Carbon Steel : Common as ASTM A105.
Stainless Steel : Such as ASTM A182 F304, F316.
Alloy Steel : Such as ASTM A182 F11, F22.
Aluminum : As ASTM B247 5083, 6061.
Copper & Copper Alloys : As ASTM B62, B61.
Nickel & Nickel Alloys : As ASTM B564 400, 600.

Size and thickness table for JIS B2220 – 5K Flanges

Size	Outside diameter (OD)	Bore	Flange Thickness	Bolt circle diameter (PCD)	Number of Bolts	Bolt Hole Diameter
1/2 inch	95 mm	15 mm	11 mm	70 mm	4	12 mm
3/4 inch	105 mm	20 mm	12 mm	75 mm	4	12 mm
1 inch	115 mm	25 mm	13 mm	90 mm	4	12 mm
1 1/4 inch	125 mm	32 mm	14 mm	100 mm	4	12 mm
1 1/2 inch	135 mm	38 mm	14 mm	110 mm	4	12 mm
2 inch	150 mm	50 mm	16 mm	125 mm	4	15 mm
2 1/2 inch	175 mm	62 mm	18 mm	145 mm	4	15 mm
3 inch	190 mm	75 mm	18 mm	160 mm	4	15 mm
4 inch	225 mm	100 mm	18 mm	185 mm	4	19 mm
5 inch	250 mm	125 mm	20 mm	210 mm	4	19 mm
6 inch	275 mm	150 mm	20 mm	240 mm	4	19 mm
8 inch	340 mm	200 mm	22 mm	295 mm	8	19 mm
10 inch	405 mm	250 mm	24 mm	350 mm	8	23 mm
12 inch	460 mm	300 mm	26 mm	400 mm	8	23 mm
14 inch	520 mm	350 mm	28 mm	445 mm	12	25 mm
16 inch	580 mm	400 mm	30 mm	510 mm	12	25 mm
18 inch	640 mm	450 mm	32 mm	545 mm	12	25 mm
20 inch	700 mm	500 mm	34 mm	605 mm	12	27 mm
24 inch	815 mm	600 mm	36 mm	725 mm	16	27 mm

Summary table of common materials used for JIS B2220 – 5K Flanges

Material Type	Describe	Application
Carbon Steel	ASTM A105, A106, A53	Suitable for general applications with medium temperature and pressure.
Stainless Steel	ASTM A182 F304, F316	Good corrosion resistance, used in food, chemical and petroleum industries.
Alloy Steel	ASTM A182 F11, F22	Withstand high temperature and pressure, often used in heavy industry.
Duplex Stainless Steel	ASTM A182 F51, F53	Resistant to corrosion and high pressure, commonly used in the petrochemical and marine industries.
Aluminum	ASTM B247 5083, 6061	Light, corrosion resistant, used in aviation and marine industries.
Copper & Copper Alloys	ASTM B62, B61	Good corrosion resistance, commonly used in water and marine industries.
Nickel & Nickel Alloys	ASTM B564 400, 600	Resistant to strong corrosion, high temperature, often used in chemical and aviation industries.
Galvanized Steel	Carbon steel is galvanized for corrosion resistance.	Used in outdoor environments and applications requiring high corrosion resistance.
High-Strength Low-Alloy Steel	ASTM A572, A588	Withstands strong impact forces, commonly used in construction and heavy industrial applications.
Heat Resistant Steel	ASTM A387 Gr. 11, Gr. 22	Withstands high temperatures, commonly used in thermal power and chemical industries.
Non-Magnetic Steel	ASTM A286, Nitronic 50, Nitronic 60	Used in applications requiring non-magnetic properties, commonly used in the aerospace and marine industries.