Japanese standard pipe caps, also known as JIS heads or Japanese standard pipe plugs, are indispensable end sealing fittings for Japanese-style industrial pressure pipelines. They are mainly used for permanent sealing of JIS standard pipeli
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The Japanese standard pipe caps we produce comply with JIS B2311, JIS B2312, and JIS B2313 standards, adopt the dual specification system of A nominal and B nominal, and are used for permanent sealing of pipe ends, plugging of spare pipe openings, partitioning of pipe network zones, and temporary sealing for hydrostatic pressure testing. Pressure ratings cover 5K, 10K, 20K, 30K, and 40K, specifications range from 15A to 1200A, and wall thicknesses cover SCH10 to SCH160 as well as the XXS extra-thick series. Materials include carbon steel SS400 and STPG370, stainless steel SUS304 and SUS316L, and heat-resistant steel STPA24 and STPA26. Production processes include seamless hot pressing, steel plate rolling and welding, and forging with precision finishing. The products serve Japanese-system energy power stations, chemical refining, food and pharmaceutical, shipbuilding, HVAC and thermal power, and pressure vessel and other engineering projects, and specific configurations can be confirmed and quoted according to project requirements.
| Product Name | JIS Cap |
| Product Category | Caps |
| All technical parameters of this product strictly align with official Japanese JIS standards, fully meeting the full-process specifications of Japanese-system engineering design, construction, and acceptance. Executive standards | JIS B2311 general pipe fittings, JIS B2312 pressure pipe fittings, JIS B2313 rolled pipe fittings; pressure ratings: 5K, 10K, 20K, 30K, 40K full Japanese-system range. Specification range: 15A–1200A full Japanese-system nominal diameter; wall thickness grades: SCH10–SCH160, XXS ultra-thick series. Mainstream Japanese-standard materials: carbon steel SS400, STPG370; stainless steel SUS304, SUS316L; heat-resistant steel STPA24, STPA26. Working temperature: conventional carbon steel -20℃ to 475℃, heat-resistant steel up to 550℃, stainless steel -196℃ to 650℃. Mechanical properties and chemical composition fully comply with Japanese industrial specifications, dimensions |
| Customization | The factory possesses full-dimensional JIS-standard upgrade and non-standard precision customization capabilities, and can undertake high-end difficult and complex plugging pipe fitting customization orders from Japan, adapting to the needs of overseas old JIS pipeline renovation, high-temperature and high-pressure, high-cleanliness, and seismic special working conditions. Supports JIS-standard non-standard size customization, and can customize special A/B nominal diameters, extended straight pipe sections, thickened pressure-bearing walls, Japanese-style special arc heights, non-standard precision bevels, and special-shaped curved pipe caps as needed, adapting to Japanese old equipment connection and JIS pipeline technical renovation projects. Supports JIS-standard special material customization, and can customize STPA24/STPA26 heat-resistant steel, highly corrosion-resistant stainless steel, duplex steel, and low-temperature special materials, adapting to Japanese-style high-temperature, vibration, and corrosion severe working conditions. Supports process upgrade customization, including high-cleanliness precision polishing, high-temperature-resistant special anti- |
| MOQ | Our factory's JIS-standard pipe caps adopt a flexible cross-border minimum order quantity model, adapting to diverse procurement needs such as sample submission for inspection in Japan and Southeast Asian Japanese-style markets, sporadic replacement parts for old pipelines, batch complete-set projects, and long-term overseas distribution. Conventional JIS-standard in-stock specifications cover 15A–400A mainstream nominal diameters, SCH40 conventional wall thickness, 10K/20K commonly used pressure, SS400 carbon steel, SU |
| Lead Time | The factory has established an independent dedicated production line for JIS-standard pipe fittings and a constant-temperature warehouse for foreign trade, with ample in-stock reserves of JIS-standard pipe caps in all specifications, efficiently responding to the delivery needs of Japanese-style engineering projects in Japan, South Korea, and Southeast Asia. JIS B2311/B2312 conventional specifications commonly used in the market, 10K/20K general pressure ratings, and JIS-standard pipe caps in mainstream materials are all in stock, and after order confirmation and payment |
| Packaging | JIS-standard pipe caps use precision moisture-proof and shock-proof packaging dedicated for Japanese-style export, adapting to long-distance cross-border transportation by China-Japan sea, air, and rail freight, and complying with Japanese factory warehousing standards and imported environmentally friendly packaging regulations. Small 15A–100A small-diameter specifications are fully wrapped independently in bubble film, with dust-proof and moisture-proof plastic protective caps installed at the ports to isolate water vapor, salt spray, and dust, and are individually packed into thickened export cartons, with the boxes printed with Japanese-English bilingual model, A nominal diameter specification, SCH wall thickness, JIS standard, K-grade pressure, and batch traceability information. Medium 125A–600A pipe caps are wrapped in double-layer waterproof and rust-proof woven fabric, with special anti-collision protective pads installed on the curved surfaces to prevent the Japanese-style precision curved structures from collision deformation and paint loss damage. Large 650A–1200A heavy-duty pipe caps use fumigation |
| Reference Price | Inquiry |
Japanese standard pipe caps use dedicated moisture-proof and shock-proof packaging for Japanese exports, suitable for long-distance cross-border transportation between China and Japan by sea, air, and rail. Small-diameter specifications from 15A–100A are individually fully wrapped in bubble film, with dust-proof and moisture-proof plastic protective caps added to the ports, packed into thickened export cartons, with the box printed with bilingual Japanese and English model, A nominal diameter specifications, SCH wall thickness, JIS standard, K-class pressure, and batch traceability information. Medium-sized pipe caps from 125A–600A are wrapped in double-layer waterproof and rust-proof woven fabric, with dedicated anti-collision pads added to the curved surfaces. Heavy-duty pipe caps from 650A–1200A are fixed on fumigated solid wood pallets, reinforced overall with steel straps, and wrapped in multiple layers of sealed packaging. All products are labeled by specification, pressure, and material classification, accompanied by bilingual certificates of conformity and material lists. Minimum order quantity and delivery time can be confirmed according to project requirements. You are welcome to contact us and provide dimensions, quantity, and material requirements so that we can assist with quotation.
We provide multilingual pre-sales and after-sales support for Japanese customers. In pre-sales, we can assist in confirming Japanese standard specification selection, matching pressure ratings from 5K to 40K, and Japanese-style working condition solutions, matching JIS standard models according to high-temperature, high-pressure, vibration, and clean environment requirements. During sales, we synchronize production, quality inspection, export packaging, and cross-border logistics information, and can provide bilingual Japanese standard qualification documents and test reports required for customs clearance and project completion. After sales, we provide an 18-month international warranty period. During the warranty period, for leakage, deformation, precision deviation, and corrosion quality defects not caused by human installation errors, we can provide free replacement, reissue products, and bear cross-border logistics losses. Equipped with a trilingual Chinese, Japanese, and English technical team, we provide overseas on-site welding guidance, Japanese-style sealing process optimization, and remote troubleshooting services.
The products strictly implement the three Japanese standards JIS B2311, JIS B2312, and JIS B2313. Dimensions, processes, pressure ratings, and material performance are produced according to Japanese standard requirements, and support third-party re-inspection in Japan. If you need inspection documents for a specific batch, please contact us to confirm.
5K and 10K are usually used for municipal plumbing and low-pressure pipelines; 20K and above are used for Japanese-style chemical, power station, and high-temperature and high-pressure process main pipelines, among which 20K is a commonly used industrial model. Specific selection needs to be combined with pipeline design pressure and media working conditions. You are welcome to contact us for assistance in confirmation.
Regular Japanese standard specifications can be shipped as single pieces, and mixed palletizing of multiple specifications and multiple K levels is supported, suitable for Japanese sample submission and sporadic replacement part needs. For specific minimum order quantities and mixed batch rules, please contact us to confirm.
Japanese and English material certificates, JIS inspection reports, flaw detection reports, and certificates of conformity can be provided. For the specific document list and issuance cycle, please contact us to confirm.
Japanese standard non-standard size customization is supported, including special A/B nominal diameters, extended straight pipe sections, thickened pressure-bearing walls, special arc heights, non-standard precision bevels, and special-shaped curved surface pipe caps; customization of STPA24, STPA26 heat-resistant steel, high corrosion-resistant stainless steel, duplex steel, and low-temperature special materials is also supported. Please provide drawings or specific parameters, and we will assist in confirming the solution.
Common JIS B2311/B2312 specifications, 10K/20K general pressure ratings, and mainstream materials are in stock. The specific minimum order quantity and delivery time are confirmed according to specification, material, and quantity. You are welcome to contact us and provide a procurement list so that we can assist with a quotation.
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