National standard pipe caps, also known as national standard heads or plugs, are core sealing accessories for industrial pipeline systems. They are mainly used for sealing and plugging operations at the ends of various national standard pip
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National standard pipe caps are used to close the ends of pipelines, block the flow of media, and prevent the entry of impurities and leakage of media. The pipe caps we produce comply with GB/T12459-2017 "Steel Butt-Welding Seamless Pipe Fittings" and GB/T13401-2017 "Steel Plate Butt-Welding Pipe Fittings". Material options include 20# carbon steel, Q235B, 16Mn low-alloy steel, 304 and 316L stainless steel. Structural types include elliptical, dished, hemispherical, spherical and flat-bottom pipe caps. Nominal diameters cover DN15 to DN1200, suitable for wall thickness grades Sch10 to Sch160, and can meet pressure conditions PN6 to PN100. The factory can supply from stock and can also make minor structural adjustments based on the national standard. Supporting material certificates, nondestructive testing reports and certificates of conformity are provided to meet the requirements of domestic engineering supervision and completion acceptance filing.
| Product Name | Standard Pipe Cap |
| Product Categories | Pipe Cap |
| All technical parameters of this product strictly align with the authoritative national standards for pipeline fittings, and are suitable for domestic engineering use requirements under all working conditions. Executive standards | GB/T12459-2017 (seamless), GB/T13401-2017 (rolled); Product types: elliptical, dished, spherical, flat-bottomed, hemispherical national standard pipe caps. Nominal diameter: DN15-DN1200; Pressure rating: PN6-PN100; Wall thickness grade: Sch10-Sch160 full national standard series. Applicable materials: 20# carbon steel, Q235B, 16Mn, 304, 316L stainless steel. Working temperature: carbon steel -20℃ to 450℃, stainless steel -196℃ to 600℃. Mechanical parameters: carbon steel tensile strength ≥410MPa, yield strength ≥245MPa, mechanical properties fully meet the national standard pipe material requirements. Dimensional accuracy: pipe mouth outer |
| Customization | The factory possesses national standard upgrade + national standard non-standard compatible customization capabilities, supporting working condition enhancement, dimensional fine-tuning, and special process upgrade customization on the basis of national standards, adapting to various complex national standard engineering renovation needs. Supports national standard non-standard dimension customization, can customize special arc height, extended straight pipe section, thickened pressure-bearing wall, non-standard end face bevel, special sealing structure pipe caps on the national standard baseline, adapting to old national standard pipeline renovation and special equipment port sealing. Supports national standard special material customization, can customize 16Mn low-temperature steel, 420 stainless steel, duplex steel, wear-resistant and anti-corrosion composite materials, adapting to high-temperature, low-temperature, strong corrosion, and ultra-high pressure special working conditions. Supports process upgrade customization, including overall fine turning and shaping, internal and external polishing, sandblasting and rust prevention, hot-dip galvanizing, anti-corrosion spraying and other strengthening treatments |
| MOQ | The company's national standard pipe caps have flexible and lenient minimum order rules, fully adapting to diverse procurement needs such as engineering sporadic replenishment, batch complete-set procurement, sample submission for inspection, and long-term distribution stocking. Conventional national standard in-stock specifications, covering DN15-DN400 mainstream calibers, Sch40 conventional wall thickness, PN16/PN25 commonly used pressures, 20# carbon steel, 304 stainless steel |
| Lead Time | The factory has established a dedicated production line for national standard pipe fittings and large-scale constant-temperature warehousing, with sufficient in-stock reserves, efficiently responding to project order delivery needs in all regions nationwide. Commonly used national standard pipe cap specifications, conventional pressure ratings, and mainstream material products in the market are all in stock; after order confirmation and payment arrival, re-inspection, sorting, and packaging for outbound delivery are completed within 24 hours, with extremely fast shipment within 1-3 working days, |
| Packaging | National standard pipe caps adopt dual reinforced packaging of domestic engineering standards + foreign trade export, taking into account both domestic construction site transportation and cross-border shipping needs, with full-process protection against bumps, deformation, rust corrosion, and wear. Small specifications DN15-DN100 pipe caps are wrapped in individual bubble bags, with port dust-proof sealing, single-layer anti-rust film sealing, classified and packed into thickened hard cardboard boxes, with the box body clearly printed with national standard model, diameter, wall thickness, material, executive standard, and batch information. Medium and large specifications DN125-DN600 are wrapped overall with double-layer waterproof and anti-rust woven fabric, with key anti-collision protective pads added on the curved surface, preventing the curved structure from bumping, paint loss, and deformation. Large-diameter DN700-DN1200 heavy-duty pipe caps are fixed with solid wood pallets, reinforced overall with steel straps, and wrapped with multi-layer sealing, completely eliminating |
| Reference Price | Inquiry |
Conventional national standard in-stock specifications cover DN15-DN400 mainstream diameters, Sch40 conventional wall thickness, PN16/PN25 commonly used pressures, 20# carbon steel and 304 stainless steel, single pieces can be shipped, no minimum order threshold, suitable for miscellaneous spare parts and maintenance replacement at construction sites. For bulk complete-set procurement, sample submission for inspection and long-term distribution stocking, you can contact us to confirm inventory and production scheduling. After order confirmation and payment receipt, re-inspection, sorting, packaging and warehousing are completed within 24 hours, and shipment is made within 1-3 working days. Packaging is stacked by specification classification, labeled independently, and distinguished by batch. Small specifications use bubble bags plus hard cardboard boxes, medium and large specifications use waterproof and rust-proof woven cloth plus anti-collision padding, and large diameters use solid wood pallets plus steel strip reinforcement, suitable for full truckload, less-than-truckload, sea freight and land transport.
Before sales, we provide national standard specification selection, pressure rating matching and working condition adaptation consultation, and recommend corresponding models according to pipeline medium, pressure and temperature. During sales, we synchronize inventory, production, quality inspection and shipping logistics information, and provide free complete sets of qualification documents and inspection materials required for national standard acceptance. After sales, we provide an 18-month warranty period. During the warranty period, for quality defects, leakage and deformation problems not caused by improper human installation, we provide free replacement, reshipment of products and bear logistics losses. Equipped with an engineering technical team, 24-hour online response, providing on-site welding guidance, plugging process suggestions and fault troubleshooting technical support.
The pipe caps we produce strictly implement GB/T12459-2017 and GB/T13401-2017, with dimensions, processes and pressure-bearing parameters controlled according to the standards, and support third-party re-inspection and supervision acceptance.
Sch80 and Sch160 thick-wall pipe caps are suitable for PN40 to PN100 high-pressure working conditions, and can be used for sealing high-pressure process pipelines in power stations and chemical plants. For specific selection, please provide the medium, pressure, and temperature parameters, and we will assist in confirming.
Standard national-standard specifications can be shipped as single pieces, with no minimum order threshold, suitable for sporadic supplementary parts and maintenance replacement at construction sites. For bulk purchases and customized specifications, please contact us to confirm.
They are uniformly sandblasted for rust removal and sprayed with national-standard anti-corrosion black paint at the factory, and can be directly used for outdoor pipeline projects. If enhanced treatment such as hot-dip galvanizing or anti-corrosion spraying is required, please contact us for customization.
We can provide certificates of conformity, material reports, and flaw detection reports free of charge, meeting the requirements for national-standard project completion filing. For other qualification documents, please contact us to confirm according to project requirements.
Customized products require production scheduling to be evaluated based on structure, material, and craftsmanship, and the minimum order quantity also varies with specifications. Please provide drawings or dimensions, material, and quantity, and we will assist in confirming the delivery time and quotation.
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