The Japanese standard flanged pipe fittings we produce strictly implement the Japanese industrial standards JIS B2220 and JIS B2291, and have independent flange outer diameter, K-grade pressure, bolt hole spacing and sealing surface specifications, and are incompatible with the dimensional systems of national standard, European standard and American standard pipe fittings, and cannot be directly interchanged or connected. Raw materials can use Japanese series grades such as SS400 carbon steel, SCPH2 cast steel, SCS13/SCS14 stainless steel, 304/316L austenitic stainless steel, etc. The forming processes include forging, seamless pushing, steel plate rolling and casting. Nominal diameters cover DN15~DN2000, and pressure ratings use the Japanese standard K grades: 5K, 10K, 16K, 20K, 30K. Product categories include Japanese standard flanged elbows, tees, concentric/eccentric reducers, crosses, caps, blind plates, nipples, etc., relying on flanges, bolts and gaskets to achieve rapid disassembly, assembly and sealing of pipelines. Suitable for low and medium pressure to medium temperature working conditions such as water supply and drainage, circulating water, gas, HVAC, ships, food and medicine, and Japanese factory process pipelines, with media including tap water, sewage, low-pressure steam, and weakly corrosive fluids. We can provide Japanese and English bilingual material certificates, hydrostatic test reports, and spectral inspection reports, and supply in large quantities to Japan itself, Japanese-funded enterprises in China, Southeast Asia, and South Korea
Overview
Japanese-standard flanged pipe fittings are flanged connection pipe fittings that we produce in accordance with the Japanese Industrial Standards JIS B2220 and JIS B2291. They have independent flange outer diameters, K-class pressure ratings, bolt hole spacing, and sealing face specifications, and are incompatible with the dimensional systems of national-standard, European-standard, and American-standard pipe fittings, and cannot be directly interchanged or connected. Product categories include Japanese-standard flanged elbows, tees, concentric/eccentric reducers, crosses, pipe caps, blind flanges, and pipe nipples, etc., relying on flanges, bolts, and gaskets to achieve rapid disassembly, assembly, and sealing of pipelines. Nominal diameters cover DN15 to DN2000, and pressure ratings adopt the Japanese-standard K-class: 5K, 10K, 16K, 20K, 30K. Raw materials can be selected from Japanese-series grades such as SS400 carbon steel, SCPH2 cast steel, SCS13/SCS14 stainless steel, and 304/316L austenitic stainless steel, and forming processes include forging, seamless pushing, steel plate rolling, and casting. We can provide Japanese-English bilingual material certificates, hydrostatic test reports, and spectral inspection reports, facilitating export to Japan and acceptance of foreign-funded projects.
Key Features
First, standard matching. We strictly produce in accordance with JIS B2220 and JIS B2291, and the flange outer diameters, K-class pressure ratings, bolt hole spacing, and sealing faces are all Japanese-standard specifications, requiring no hole modification or grinding when connecting to Japanese-series valves, pumps, and pressure vessels. Second, complete coverage of diameters and pressures. Full diameters from DN15 to DN2000 and full pressure ratings from 5K to 30K can match selection requirements from low-pressure civil use to large-diameter industrial pipeline networks. Third, flexible material selection. SS400 carbon steel, SCPH2 cast steel, SCS13/SCS14 stainless steel, and 304/316L austenitic stainless steel adapt to different media and corrosion conditions. Fourth, complete categories. Elbows, tees, reducers, crosses, pipe caps, blind flanges, and pipe nipples can be fully equipped in one stop, reducing the connection costs of multi-brand procurement. Fifth, supporting export documents. Japanese-English bilingual material certificates, hydrostatic test reports, and spectral inspection reports can be provided, facilitating export to Japan and acceptance of foreign-funded projects. Sixth, customization support. Non-standard dimensions, special hole spacing, extended wall thickness, and surface treatment can be customized according to Japanese-series drawings, JIS technical agreements, or imported equipment parameters.
Applications
Japanese-standard flanged pipe fittings are mainly used for supporting Japanese-standard industrial equipment, Japanese and Korean foreign-funded factories, Southeast Asian Japanese-standard system infrastructure, foreign-related ships, water treatment, and gas electromechanical pipeline engineering, specifically solving the adaptation problems in which national-standard, American-standard, and European-standard pipe fittings cannot connect to Japanese equipment, Japanese-series valves, and Japanese-series pressure vessels. The products mainly achieve turning, diversion, confluence, diameter reduction, plugging, and equipment port transition in pipeline systems, adapting to Japanese-series electromechanical equipment pipelines, process auxiliary pipelines, water supply and drainage, HVAC, gas, and industrial circulating water systems. Japanese-standard pipe fitting flanges have smaller outer diameters, regular hole spacing arrangement, and compact installation space, suitable for Japanese-series factory layouts with dense equipment and complex pipelines. They can transport tap water, circulating water, sewage, low-pressure steam, ordinary oil and gas, and weakly corrosive fluids. In specific projects, they are commonly found in water supply and drainage and circulating water networks of Japanese-funded factories in China, Japanese-standard municipal water supply and sewage treatment projects in Japan proper and Southeast Asia, auxiliary pipelines in ship engine rooms, inlet and outlet connections of Japanese-series water pumps, valves, and pressure vessels, and bulk procurement by exporters to Japan.
Specifications
The executed standards are JIS B2220 and JIS B2291. Nominal diameters are DN15 to DN2000. Pressure ratings are Japanese-standard K-class: 5K, 10K, 16K, 20K, 30K. Optional materials include SS400 carbon steel, SCPH2 cast steel, SCS13/SCS14 stainless steel, and 304/316L austenitic stainless steel. Product categories include Japanese-standard flanged elbows, tees, concentric/eccentric reducers, crosses, pipe caps, blind flanges, and pipe nipples, etc. Working temperature is -20℃ to 420℃. Flange sealing faces are mainly RF raised face and FF full face, and some high-pressure specifications support male-female face structures. Flange structures include plate-type flat welding, neck butt welding, neck flat welding, blind flanges, and threaded flanges. Products undergo hydrostatic pressure test, full inspection of appearance and dimensions, spectral material re-inspection, and weld seam flaw detection before leaving the factory. If you need to confirm the dimensional tolerances, bolt hole spacing, or sealing face parameters of specific specifications, please contact us and provide the diameter, pressure rating, and material requirements.
Purchasing & Delivery
We adopt a flexible minimum order model for foreign trade with Japan. Conventional 5K and 10K mainstream Japanese-standard small and medium diameter in-stock specifications support ordering from 1 piece, which can meet the needs of sample sending to Japan, emergency repair of pipeline networks of Japanese enterprises in China, local modification of Japanese-series equipment, and replacement of original pipe fittings. The warehouse regularly stocks 5K/10K mainstream pressure, small and medium diameter carbon steel and stainless steel Japanese-standard stock, and ships within 24 to 48 hours after order confirmation. For the delivery time of bulk orders and high-pressure non-standard customized orders, please contact us to confirm. In terms of packaging, carbon steel Japanese-standard pipe fittings are sprayed with anti-rust oil and wrapped with anti-rust isolation paper, and stainless steel SCS-series pipe fittings are separately classified and protected; flange sealing faces are equipped with protective cover plates and cushioning rubber pads, and bolt holes are equipped with dust-proof protective sleeves; small and medium diameter precision pipe fittings are individually wrapped in bubble film and packed in thickened export cartons, while medium and large diameter heavy pipe fittings are fixed on fumigated solid wood pallets, reinforced with steel straps, and fully wrapped in multi-layer waterproof stretch film. The outer packaging is printed with Japanese-English bilingual shipping marks, JIS standard, K-class pressure, DN diameter, material, and batch information, and is accompanied by bilingual packing lists and quality inspection lists. Please inquire for prices; you are welcome to provide dimensions, quantity, material, and pressure rating so that we can assist with quotation.
Service & Support
We provide a 12-month official warranty service for Japanese-standard flanged pipe fittings. During the warranty period, for non-human-caused overpressure or improper installation and use, if there are any Japanese-standard specification mismatches, sealing leaks, dimensional deviations, or process quality defects, we will remake them free of charge, reship them free of charge, and bear the logistics and rework losses. Before sale, we provide free Japanese-standard K-class selection, Japanese-series equipment matching verification, Chinese-foreign standard comparison, review of drawings for Japan, and budget guidance for foreign-funded projects; during sale, we follow up throughout the entire process of precision machining, Japanese-standard quality inspection, export fine packaging, and customs declaration and shipping progress; after sale, we provide Japanese-series pipeline installation and connection guidance, pipeline network commissioning, troubleshooting, and bilingual technical connection. We support seven-day no-reason return and exchange for unused standard products, 2-hour rapid response after-sale service, and lifetime free provision of JIS Japanese-standard pipe fitting technical consultation and standard matching services. If you need to confirm certification or qualification documents, please contact us, and we will assist in confirming the types of documents that can be provided according to project requirements.
FAQ
Can Japanese standard flanged pipe fittings be used interchangeably with Chinese standard, European standard, and American standard ones?
They cannot be used interchangeably. Japanese standards implement the independent JIS B2220 standard, and the K-grade pressure, flange outer diameter, bolt hole spacing, and thickness dimensions are completely different from other standards. Mixed use will cause problems such as mismatched hole positions, inability to connect, seal failure, and failure to meet pressure-bearing requirements. Japanese-style equipment and Japanese-standard projects must use dedicated Japanese-standard pipe fittings.
In which countries and regions are Japanese standard flanged pipe fittings mainly used?
They are mainly used in Japan itself, Japanese enterprises in China, South Korea, Vietnam, Thailand, Indonesia, and other Southeast Asian countries and foreign-related projects that continue to use the JIS Japanese standard system.
Can they completely replace original imported Japanese pipe fittings?
We produce according to the JIS B2220 and JIS B2291 standards, and the flange outer diameter, K-grade pressure, bolt hole spacing, and sealing surface are all Japanese standard specifications, so they can directly replace original Japanese factory pipe fittings for supporting Japanese-style equipment. As to whether they can replace fittings in a specific project, please contact us and provide the original factory model or drawings, and we will assist in confirming.
What materials are available for Japanese standard flanged pipe fittings?
Available options include Japanese-series grades such as SS400 carbon steel, SCPH2 cast steel, SCS13/SCS14 stainless steel, and 304/316L austenitic stainless steel. Different materials are suitable for different media and corrosion conditions. Please contact us to confirm the material suitable for your project.
What are the minimum order quantity and delivery lead time?
Standard 5K and 10K mainstream Japanese standard small and medium diameter in-stock specifications support a minimum order of 1 piece. In-stock orders kept in the warehouse are shipped within 24 to 48 hours after order confirmation. For the lead time of bulk orders and high-pressure non-standard custom orders, please contact us to confirm.
