Butt Weld Pipe Cap
Our seamless butt weld pipe cap is hot spinning formed pipe fitting for sealing pipeline terminal ends. Manufactured strictly to ASME B16.9 & Indian IS 1239 standards, all sizes keep full nominal dimension without minus tolerance, widely used for petroleum, chemical, power and water supply pipeline end closure.
Overview
Butt Weld Pipe Cap, also known as pipeline end cap, is a seamless hot spinning butt-weld fitting with hemispherical dome structure. It is welded to the terminal of pipelines to fully seal flow passages, isolate medium and protect pipeline ends from dust, corrosion and pressure leakage.
Integral seamless spinning forming ensures uniform wall thickness and excellent pressure resistance. Raw materials cover carbon steel A234 WPB and stainless steel A403 WP304 / WP316L. We strictly control outer diameter and wall thickness of every pipe cap, guarantee zero minus tolerance without thin-wall cutting corners. Complete inch & metric size range supports all industrial pipeline matching requirements.
Core Key Features
- One-piece seamless hot spinning molding, uniform wall thickness, high pressure & impact resistance
- Hemispherical dome design, smooth inner surface, no medium stagnation dead zone, low fluid resistance
- Butt weld connection, full penetration welding, reliable sealing for heavy-duty industrial pipelines
- Available materials: Carbon Steel A234 WPB; Stainless Steel A403 WP304 / WP316L
- Compliance with global standards: ASME B16.9, ASTM A234, ASTM A403, IS 1239
- Full size coverage: DN15 ~ DN1200 (1/2″ ~ 48″), custom wall thickness & length supported
- Zero minus tolerance on outer diameter and wall thickness, full standard nominal size
- Full UT ultrasonic NDT inspection & hydrostatic pressure test before shipment, complete MTC material test certificates provided
Technical Specification
| Item | Technical Parameter |
|---|---|
| Product Name | Butt Weld Pipe Cap / End Cap |
| Connection Type | Butt Weld (BW) |
| Production Craft | Seamless Hot Spinning Forming |
| Executive Standard | ASME B16.9, ASTM A234, ASTM A403, IS 1239 |
| Main Materials | Carbon Steel A234 WPB; Stainless Steel A403 WP304 / WP316L |
| Size Range | DN15 ~ DN1200 / 1/2″ ~ 48″ |
| Wall Schedule | Sch40, Sch80, Sch160, XXS, Custom wall thickness |
| Structure Feature | Hemispherical dome for pipeline end sealing |
| Dimensional Tolerance | Full standard nominal size, zero minus tolerance |
| Inspection Items | UT Ultrasonic Test, Hydrostatic Pressure Test, Full Dimension Inspection |
| Surface Treatment | Black anti-rust paint / Sandblasting (Carbon Steel); Pickling & Passivation (Stainless Steel) |
Applications
- Petroleum & natural gas transmission pipeline terminal sealing
- Chemical plant high-pressure process pipeline end closure
- Thermal power station steam & condensate pipeline end protection
- Water supply, sewage and municipal wastewater treatment engineering
- Food & pharmaceutical stainless steel clean pipeline terminal seal
- Indian IS 1239 standard construction & industrial pipeline projects
- Offshore platform fluid conveying pipeline end blocking
Why Choose Our Butt Weld Pipe Cap
- Direct factory manufacturer supply, large stock of regular sizes, competitive ex-work factory price
- All pipe caps produced to full standard dimensions with zero minus tolerance, never cut corners with thin walls
- Support custom wall thickness, length and surface treatment based on customer drawings
- Complete full-process quality inspection, full set of test certificates for export customs clearance
- Fast delivery within 7–15 working days for standard stock items
- Standard export wooden case packaging, anti-rust and anti-collision protection for long-distance sea transport
FAQ
Q1: What is pipe cap used for?
Q2: Do your butt weld pipe caps have minus tolerance on wall thickness?
Q3: Can you produce pipe caps complying with Indian IS 1239 standard?
Q4: Can you supply stainless steel butt weld pipe caps?
