THD threaded pipe cap
THD threaded pipe caps are special pipe fittings for detachable end sealing in industrial piping systems. They rely on precision internal threads to screw and lock with the external threads of the pipe, achieving pipeline port closure, rese
Inquiry
- Our factory's THD threaded pipe caps highlight five core advantages: dense die forging, precision threads, weld-free installation, detachable and reusable, and explosion-proof safety.
- They are a hot-selling product in the foreign trade of high-pressure threaded pipe fittings. The product adopts an integral hot die forging one-piece molding process,
- Dense and uniform internal metallographic structure
- with no porosity, sand holes, or loose defects,
- and its pressure resistance, impact resistance, and resistance to media fatigue far exceed those of ordinary turned pipe fittings. The threads are processed by CNC precision finish turning,
Detailed Introduction
THD threaded pipe caps belong to forged threaded pipe fittings. THD means Threaded. They are connected by screwing the internal thread with the external thread of the pipe, and are used for detachable sealing at the end of pipelines. The products mainly follow ASME B16.11 and GB/T14383 standards, are formed by integral die forging, and the specifications are mainly small diameters from DN6 to DN100. The pressure ratings cover 3000LB, 6000LB, and 9000LB American standard pound ratings. Thread types include NPT American standard tapered pipe thread and BSPP/BSPT British standard pipe thread. Materials include A105 carbon steel, 304/316L stainless steel, heat-resistant alloy steel, duplex steel, etc. Compared with welded pipe caps, threaded connections require no hot work, can be freely disassembled and reassembled, and are reusable, making them suitable for pipeline ports that require regular inspection, cleaning, or instrument maintenance. We can confirm specific specifications, materials, and thread systems according to project requirements. You are welcome to contact us for selection advice and quotations.
- Integral die forging forming, dense forged structure, no porosity or sand hole defects, and compressive and impact resistance superior to ordinary machined pipe fittings
- Threads are processed by CNC precision fine turning, with full tooth profile, high meshing degree, accurate coaxiality, smooth screwing, and tight sealing when used with sealing auxiliary materials
- Welding-free installation, no hot work required, suitable for construction in explosion-proof workshops, confined spaces, and equipment-dense areas
- Can be repeatedly disassembled, convenient for regular pipeline inspection, cleaning, and instrument maintenance, reducing later maintenance difficulty
- Specifications cover DN6~DN100, pressure ratings include 3000LB, 6000LB, 9000LB, thread systems cover NPT, BSPP, BSPT, and can be confirmed according to project requirements
- Supports non-standard customization, including special diameters, thickened wall thickness, non-standard pound ratings, special pitch threads, and multiple material options
| Product Name | THD Threaded Cap |
| Category | Contact Us to Confirm |
| Customization | Our factory has comprehensive high-end non-standard customization capabilities for THD threaded pipe caps, and can precisely match the precision working condition requirements of various special threads, ultra-high pressure, high temperature, and strong corrosion. Specification customization supports arbitrary non-standard diameters from DN6–DN100, special thickened wall thickness, non-standard pound rating parameters, and special pitch thread customization, adapting to the connection dimensions of niche imported equipment. Thread systems can be customized to special specifications such as non-standard NPT, BSP, G thread, and metric thread, solving the problem of incompatible equipment interfaces. Material customization can be made of A105 carbon steel, 304/316L stainless steel, 15CrMo heat-resistant steel, 2205 duplex steel, titanium alloy special materials, adapting to extreme working conditions of high temperature, high pressure, and acid-base corrosion. Process customization supports ultra-high pressure forging strengthening, threads |
| MOQ | To accommodate the diverse needs of foreign trade threaded pipe fitting trial orders, sporadic engineering replenishment, bulk supporting for equipment manufacturers, and overseas warehousing stockpiling, our factory has set relaxed and flexible minimum order quantity standards for THD threaded pipe caps, greatly lowering the threshold for cooperation with global customers. For stock models with conventional standard diameters, conventional pressure ratings, and general thread systems, the MOQ is as low as 1 piece, supporting overseas sample testing, partial engineering replenishment, |
| Lead Time | Our factory has a dedicated production line for threaded forged pipe fittings and temperature-controlled dust-proof warehousing. The delivery time for THD threaded pipe cap orders is stable and efficient, precisely matching the pace of foreign trade shipments and the progress of domestic fine pipeline engineering. For conventional stock standard models of 3000LB and 6000LB, after payment confirmation, fine inspection, protective packaging, and ultra-fast warehouse dispatch and shipment are completed within 24–48 hours. Within 1,000 pieces |
| Packaging | Our factory's THD threaded pipe caps use special protective packaging for foreign trade precision forged pipe fittings, focusing on protecting precision thread profiles, eliminating transportation bumps, wear, and rust, suitable for ocean shipping, international air freight, and long-distance land transport cross-border logistics. Small single pipe caps are individually wrapped in anti-static PE film, and special plastic thread protective caps are added to the threaded parts, firmly protecting the precision thread profiles from wear, deformation, and missing threads. Products are neatly classified and packed into thickened export cartons, with high-strength moisture-proof desiccant inside, preventing oxidation and rusting in humid ocean shipping environments and moisture corrosion of threads. The outer layer of the carton is wrapped with waterproof stretch film for reinforcement, and bulk full-order goods are uniformly stacked on fumigation-free solid wood pallets, secured with high-strength strapping, eliminating shifting from bumps and carton damage. All packaging complies with customs export inspection standards |
| Reference Price | Inquiry |
| Standard | ASME B16.11, GB/T14383 |
Applications
- Port sealing of oil and gas process branch pipes, chemical high-pressure small pipes, steam auxiliary pipelines, and gas pressure regulating pipelines in petrochemical plants
- Sealing of boiler instrument sampling pipes, steam pressure detection pipelines, and power station automatic control pipelines in power plants
- Sealing of clean threaded pipelines in pharmaceutical, food, and fine chemical industries, with no welding contamination and convenient disassembly and assembly
- Sealing and retrofitting of high-pressure fire-fighting threaded pipelines and low/high-pressure gas branch lines
- Sealing of high-pressure pipelines and auxiliary pipelines on ships and offshore platforms, with vibration resistance and stable sealing performance
Overview
THD threaded pipe cap is a detachable sealing pipe fitting connected by screwing the internal thread with the external thread of the pipe. THD stands for Threaded, and in the industry it is also called a threaded pipe cap or threaded plug. The product belongs to forged threaded pipe fittings, mainly following ASME B16.11 and GB/T14383 standards, formed by integral die forging process, with specifications mainly DN6~DN100 small diameters, pressure ratings including 3000LB, 6000LB, 9000LB American standard pound ratings, thread types covering NPT American standard tapered pipe threads and BSPP/BSPT British standard pipe threads, and materials including A105 carbon steel, 304/316L stainless steel, heat-resistant alloy steel, duplex steel, etc. Unlike welded pipe caps, threaded connections require no hot work welding, allow free disassembly and assembly, can be reused, and are suitable for pipe ports that require regular inspection, cleaning, or instrument maintenance.
Key Selling Points
The THD threaded pipe caps we produce are formed in one piece through an integral hot die forging process, with a dense and uniform internal metallographic structure, free of porosity, sand holes, and shrinkage defects, and with compressive, impact, and media fatigue resistance superior to ordinary machined pipe fittings. The threaded portion is processed by CNC precision fine turning, with full thread profiles, high engagement, and accurate coaxiality, allowing smooth screwing, and together with sealing auxiliary materials it can achieve long-term tight sealing. The weld-free installation method requires no hot work, making it suitable for construction in explosion-proof workshops, confined spaces, and equipment-dense areas. The product can be repeatedly disassembled, facilitating regular pipeline inspection, cleaning, and instrument maintenance, reducing later maintenance difficulty. Specifications cover DN6~DN100, pressure ratings include 3000LB, 6000LB, and 9000LB, thread types cover NPT, BSPP, and BSPT, and non-standard customization is supported.
Applications
THD threaded pipe caps are mainly used in pipeline scenarios with small diameter, high pressure, explosion-proof welding prohibition, and the need for frequent disassembly and maintenance. In the petrochemical field, they are suitable for port sealing of oil and gas process branch pipes, chemical high-pressure small pipes, steam auxiliary pipelines, and gas pressure-stabilizing pipelines; in the power and power station field, they are used for closing boiler instrument sampling pipes, steam pressure detection pipelines, and power station automatic control pipelines; in clean pipelines such as pharmaceuticals, food, and fine chemicals, they involve no welding contamination and are convenient to disassemble and assemble; in the fire protection and municipal fields, they are suitable for high-pressure fire threaded pipe networks and gas branch pipe sealing renovations; in ships and marine engineering, they are used for sealing marine high-pressure pipelines and platform auxiliary pipelines, with vibration resistance and stable sealing performance. The product requires no hot work, making it suitable for construction in explosion-proof workshops, confined spaces, and equipment-dense areas.
Specifications
The conventional specifications of THD threaded pipe caps are mainly small diameters from DN6~DN100, pressure ratings include 3000LB, 6000LB, and 9000LB American standard pound classes, thread types include NPT American standard tapered pipe threads and BSPP/BSPT British standard pipe threads, and materials cover A105 carbon steel, 304/316L stainless steel, heat-resistant alloy steel, duplex steel, etc. The product mainly follows ASME B16.11 and GB/T14383 standards. If you need to confirm the specific diameter, pound class, thread type, or material, please contact us, and we can assist with selection according to project requirements.
Purchase & Delivery
We have set flexible minimum order quantity standards for THD threaded pipe caps. For in-stock models with conventional standard diameters, conventional pound classes, and general thread types, the MOQ is as low as 1 piece, supporting overseas sample inspection, partial project replenishment, and bulk supporting for equipment manufacturers. For conventional in-stock standard models of 3000LB and 6000LB, precision inspection, protective packaging, and warehouse dispatch can be completed within 24–48 hours after payment confirmation. The product uses protective packaging specially for foreign trade precision forged pipe fittings: individual small pipe caps are each wrapped in anti-static PE film, the threaded parts are fitted with special plastic thread protection caps, they are sorted into thickened export cartons, moisture-proof desiccant is placed inside, the outer layer of the carton is reinforced with waterproof stretch film wrapping, and bulk full orders are stacked on fumigation-free solid wood pallets. The packaging complies with customs export inspection standards, and customer-specific shipping marks, LOGO, specification models, and batch numbers can be printed as needed. For specific delivery times and packaging requirements, please contact us for confirmation.
Service & Support
We provide pre-sales and after-sales support for B-end customers purchasing THD threaded pipe caps. Before sales, we can assist with thread type selection, pound class matching, and material working condition analysis to help avoid selection errors. After sales, we provide thread assembly techniques, sealing process guidance, and technical Q&A for pipeline maintenance. After the order is shipped, we provide full-process logistics tracking, synchronize transport dynamics in real time, and assist overseas customers with customs clearance and receipt. The product warranty period is 18 months, and within the warranty period, quality problems not caused by human damage are repaired or replenished free of charge. If problems such as factory quality defects, thread flaws, dimensional deviations, or material inconsistency occur, free returns, exchanges, and replacement shipments are supported. Dedicated after-sales support responds online 7×24 hours. Welcome to contact us to learn about detailed service terms.
FAQ
What working conditions are THD threaded pipe caps suitable for?
THD threaded pipe caps are mainly used in pipeline scenarios with small diameter, high pressure, explosion-proof welding prohibition, and the need for frequent disassembly and maintenance, and are widely used for instrument pipelines, equipment spare ports, and sealing of small fire protection and gas pipes. Weld-free installation is safe and convenient, making them suitable for construction in explosion-proof workshops, confined spaces, and equipment-dense areas.
What are the commonly used thread standards?
Standard options include NPT American standard tapered threads, BSPT British standard tapered threads, and BSPP straight threads, suitable for projects in China, the United States, Europe, the Middle East, and Southeast Asia. If you have special thread standard requirements, please contact us for confirmation.
Are the threads reliable in precision?
The threads are machined by full CNC precision turning, with full thread profiles, no broken threads and no burrs, and tight engagement. Combined with sealing auxiliary materials, they can achieve tight sealing and reduce leakage risks.
How do we choose between SW socket weld and BW butt weld pipe caps?
When disassembly, explosion protection, or work in narrow spaces is required, THD threaded pipe caps are recommended; for high-pressure permanent sealing scenarios, BW butt weld pipe caps can be selected. For specific selection, please contact us, and we can assist in confirmation according to the project working conditions.
What are the minimum order quantity and delivery time?
For in-stock models with conventional standard diameters, conventional pressure ratings, and general thread standards, the MOQ is as low as 1 piece. For 3000LB and 6000LB conventional in-stock standard models, precision inspection, protective packaging, and warehouse dispatch and shipment are completed within 24–48 hours after payment confirmation. For specific delivery times and custom orders, please contact us for confirmation.
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