Carbon steel pipe caps are core terminal sealing fittings for carbon steel piping systems, mainly used for permanent sealing of the ends of various carbon steel process pipelines, heating networks, oil and gas transmission pipelines, and mu
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Carbon steel pipe caps are the sealing accessories with a relatively large usage volume in industrial piping systems. The main body material is low-carbon carbon steel, and commonly used grades include 20#, Q235B, Q345B, ASTM A234 WPB, ST35.8, STPG370, etc. The products are formed through integral hot-pressing seamless forming, steel plate rolling and welding forming, or forging and precision machining forming. The pipe wall is dense and uniform, with stable sealing performance, and can adapt to working conditions from atmospheric pressure to ultra-high pressure, and from normal temperature to medium-high temperature. Specifications cover the full bore of DN15–DN2000, adapt to wall thickness grades such as SCH10, SCH40, SCH80, SCH160, XXS, as well as pressure grades PN10–PN100, Class150–1500, 5K–40K. Implemented standards include GB/T12459, ASME B16.9, DIN2617, EN10253, JIS B2312, GOST17379. We supply to EPC engineering general contractors, oil and gas chemical infrastructure contractors, thermal power construction units, municipal gas construction teams, pressure vessel manufacturers, cross-border B2B traders, and pipeline supporting procurement enterprises, supporting standard specification bulk procurement and non-standard customization.
| Product Name | Carbon Steel Cap |
| Categories | Caps |
| This series of carbon steel pipe caps has parameters that comprehensively cover common domestic and international industrial standards, and adapts to the design and acceptance requirements of various carbon steel piping projects worldwide. Implemented standards | GB/T12459, ASME B16.9, DIN2617, EN10253, JIS B2312, GOST17379. Commonly used material grades: 20#, Q235B, Q345B, ASTM A234 WPB, ST35.8, STPG370. Specification range: DN15–DN2000, 1/2″–48″ imperial inch diameter; wall thickness grades: SCH10, SCH40, SCH80, SCH160, XXS extra heavy. Pressure adaptation grades: PN10–PN100, Class150–1500, 5K–40K. Working temperature range: -20℃ to 480℃, suitable for normal temperature, medium and high temperature |
| Customization | Our factory has full-dimensional standard upgrading and non-standard customization capabilities for carbon steel pipe caps, and can undertake custom orders for carbon steel plugging pipe fittings under various special working conditions, special sizes, and special processes. Supports customization of special-shaped carbon steel pipe caps such as non-standard diameters, non-standard wall thicknesses, non-standard arc heights, extended straight edges, irregular curved surfaces, eccentric structures, and reducing plugging, suitable for technical transformation of old pipe networks, multi-standard mixed pipelines, and special equipment interface plugging scenarios. Supports customization of high-strength low-alloy Q345B and high-temperature-resistant special carbon steel materials, meeting medium and high pressure, alternating temperature differences, and heavy-duty industrial working conditions. Supports process upgrade customization, including overall finish turning and shaping, precision groove machining, hot-dip galvanizing anti-corrosion, heavy-duty weather-resistant coating, and outdoor-specific rust prevention treatment. Can customize Chinese and English laser marking, engineering number engraving as needed, |
| MOQ | Our factory's carbon steel pipe caps adopt an ultra-low-threshold flexible minimum order mode, suitable for various procurement needs such as domestic and international engineering spare parts, sample submission for inspection, small-batch trial orders, and full-container bulk distribution. Conventional standard specifications on the market, including DN15–DN600 mainstream nominal diameters, SCH40 conventional wall thickness, PN16/PN25 commonly used pressure, 20#/Q235B/A234WP |
| Lead Time | The factory has established a dedicated standardized production line for carbon steel pipe caps and a large-area constant-temperature finished product warehouse, with massive stock of standard specifications available, rapidly responding to various pipeline engineering delivery needs at home and abroad. Carbon steel pipe caps in conventional sizes, conventional wall thicknesses, and mainstream materials under commonly used national standards, American standards, European standards, and German standards on the market are all in stock. After order confirmation, re-inspection, sorting, and standardized export packaging are completed within 24 hours |
| Packaging | Carbon steel pipe caps use standardized export industrial protective packaging, taking into account the long-distance transportation protection needs of domestic land transport and international sea, air, and rail transport, preventing collision deformation, paint peeling, moisture, and rust during transportation. Small DN15–DN100 small-diameter pipe caps are individually fully wrapped in bubble film, with dust-proof and moisture-proof plastic protective caps added to the ports, isolating water vapor, dust, and oxidative corrosion, and individually packed into thickened export cartons, with specifications, materials, standards, and batch information clearly printed on the box. Medium-sized DN125–DN600 specifications are fully wrapped in double-layer waterproof and rust-proof woven fabric, with anti-collision buffer pads added to the curved surfaces, protecting the integrity of the curved structure from deformation. Large DN600–DN2000 large-diameter heads are fixed with fumigated solid wood pallets, reinforced with multi-point steel straps, and overall protected against |
| Reference Price | Quote |
Conventional GB, American standard, European standard, and German standard sizes and mainstream material carbon steel pipe caps are in stock. Within 24 hours after order confirmation, re-inspection, sorting, and standardized export packaging will be completed. Small-diameter DN15–DN100 are fully wrapped in bubble film with dust-proof and moisture-proof protective covers, packed in thickened export cartons; DN125–DN600 use double-layer waterproof and rust-proof woven fabric plus impact-resistant buffer padding; DN600–DN2000 are secured on fumigated solid wood pallets, reinforced with steel straps, and fully sealed with waterproof wrapping. Pallets comply with international customs quarantine standards. All products are stacked by specification, wall thickness, and material, individually labeled, and traceable by batch, accompanied by bilingual Chinese-English certificates of conformity, material lists, and quality inspection reports. For specific delivery times and logistics solutions, please contact us for confirmation.
Before sales, we provide working condition analysis, specification selection, standard matching, and pressure rating adaptation consultation, assisting in matching carbon steel materials and models according to medium, temperature, pressure, and construction standards. During sales, we synchronize production, quality inspection, packaging, and logistics progress, providing bilingual Chinese-English qualification documents, acceptance materials, and customs clearance documents. After sales, we provide an 18-month international warranty period. During the warranty period, for product leakage, cracking, deformation, material mismatch, or process defects caused by non-human installation errors, we provide free replacement or reissue and bear the corresponding cross-border logistics losses. Equipped with a 24-hour bilingual Chinese-English technical service team, we can provide remote installation guidance, welding process recommendations, and troubleshooting.
The product is compatible with six mainstream standards: GB/T12459, ASME B16.9, DIN2617, EN10253, JIS B2312, and GOST17379, with complete specifications and strong interchangeability. If the project adopts mixed standards or non-standard interfaces, please contact us to confirm the specific matching solution.
20# and Q235B are suitable for ordinary room-temperature low-pressure working conditions, with high cost-effectiveness; Q345B low-alloy steel has higher strength and is suitable for high-pressure, low-temperature, and heavy-load working conditions; ASTM A234 WPB is a material dedicated to American-standard exports and is commonly used in overseas EPC projects. For specific selection, you can contact us, and we will assist in confirming according to the medium, temperature, and pressure.
Conventional standard specifications can be shipped from 1 piece, and mixed batches are supported. Project replenishment parts, sample submissions for inspection, small-batch trial orders, and full-container bulk distribution can all be undertaken. For the specific minimum order quantity and mixed-batch rules, please contact us to confirm.
Yes. We support customization such as non-standard diameters, non-standard wall thicknesses, non-standard arc heights, extended straight edges, special-shaped curved surfaces, eccentric structures, and reducing plugs, and can also do hot-dip galvanizing, heavy-duty anti-corrosion spraying, outdoor anti-rust treatment, and laser marking. Please provide drawings or dimensional requirements, and we will assist with modeling verification and confirm the process plan.
We provide an 18-month international warranty period. During the warranty period, for product leakage, cracking, deformation, material nonconformity, or process defects caused by non-human installation errors, we will replace or reship free of charge and bear the corresponding cross-border logistics losses. At the same time, we are equipped with a 24-hour Chinese-English technical service team that can provide remote installation guidance and welding process recommendations.
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