説明
Factory-made butt-welding pipe fitting
ASTM A234 WPB Carbon Steel Butt Weld Cap
A robust, economical factory-made closure for carbon steel process piping, supplied with the wall thickness, bevel and documentation required by the project.
What is an ASTM A234 WPB butt weld cap?
アン ASTM A234 WPB butt weld cap is a wrought carbon steel fitting used to permanently close a pipe, manifold or header. The cap is formed to a rounded closed profile and welded directly to the matching pipe, eliminating a gasketed joint and minimizing installed envelope.
WPB is a widely used carbon steel fitting grade for moderate- 高温サービス. It is commonly paired with compatible carbon steel piping in oil and gas, 力, steam and industrial utilities. Low-temperature service with project impact requirements may instead call for ASTM A420 WPL6.
A234 WPB butt weld cap specifications
| 製品タイプ | Carbon steel butt weld pipe cap / BW end cap |
|---|---|
| 材質仕様 | ASTM A234 WPB |
| 寸法規格 | ASME B16.9 |
| 呼び径 | NPS 1/2–48 / DN15–DN1200, subject to wall and manufacturing route |
| 肉厚 | シュ 20, 30, STD, 40, 60, XS, 80, 100, 120, 140, 160, XXS and custom wall |
| 工事 | Seamless or welded as applicable and ordered |
| 終了準備 | Butt-weld bevel to the ordered pipe wall and welding detail |
| Surface protection | Bare, anti-rust oil, black paint or project-specific coating |
| Testing options | 寸法検査, MT, ユタ州, RT, hardness or third-party inspection as specified |
| ドキュメント | EN 10204 3.1 MTC, heat traceability and inspection records as ordered |
Dimensions and tolerances follow the ordered standard and edition. Final pressure-temperature suitability is determined by the piping design code, 材料, 壁の厚さ, matching pipe and service conditions.
ASME and European project requirements
North American projects
特定 ASTM A234 WPB, ASME B16.9, NPS, スケジュール, 工事, 準備を終える, surface protection and supplementary testing. State any sour-service or project chemistry restrictions separately.
欧州プロジェクト
For EN-based projects, specify the required EN steel grade and product standard rather than assuming direct equivalence with WPB. Include DN, 壁, fitting dimensions, coating and EN 10204 証明書の種類.
A234 WPB vs A420 WPL6 pipe cap
| 選定のポイント | ASTM A234 WPB | ASTM A420 WPL6 |
|---|---|---|
| Primary service family | 適度- and elevated-temperature carbon steel piping | Low-temperature carbon steel piping |
| Impact requirements | As required by design code and project specification | Low-temperature impact testing is a defining procurement consideration |
| Typical use | 油, ガス, スチーム, power and utilities | Cold-climate, refrigerated and low-temperature process systems |
| 選択ルール | Use when the design specification calls for A234 WPB | Use only with the ordered WPL6 heat treatment and impact criteria |
代表的な用途
| 業界 | 代表的なサービス | Selection reason |
|---|---|---|
| 石油とガス | Process headers, gathering lines and equipment branches | Common carbon steel fitting grade and broad availability |
| 発電 | Steam, condensate and plant utility terminations | Robust butt-welded construction |
| 石油化学 | Hydrocarbon and general process piping | Schedule range and project inspection options |
| 産業用公益事業 | 水, compressed air and non-corrosive services | Economical permanent closure |
Application examples are guidance only. The project engineer must confirm material compatibility, 腐食代, impact requirements and design-code compliance.
製造業, 検査と文書化
Manufacturing may include cutting, forming, heat treatment as required, 較正, bevel machining, surface preparation and inspection. The purchase order should state construction, 追試, impact requirements if any and coating system.
Heat-number control and MTC review against the purchase specification.
外径, 全長, 壁の厚さ, ovality and bevel geometry checked as ordered.
PT, MT, ユタ州, RT, hardness or third-party inspection can be arranged when specified.
EN 10204 3.1 certificate and inspection records supplied according to the purchase order.
見積依頼チェックリスト
- Material grade and product specification
- 寸法規格とエディション
- NPS or DN size
- Pipe schedule or exact wall thickness
- Seamless or welded construction, when required
- End preparation and bevel detail
- Quantity and delivery destination
- MTC, 臨死体験および第三者検査の要件
よくある質問
What does ASTM A234 WPB cover?
ASTM A234 WPB is a carbon steel fitting grade used for wrought fittings in moderate- and elevated-temperature piping applications. ASME B16.9 supplies the fitting dimensions and tolerances.
Is WPB suitable for low-temperature service?
Do not assume so from the grade name. Low-temperature piping with specified impact toughness commonly uses ASTM A420 WPL6 or another material selected by the project engineer.
Can the cap match Sch 160 or XXS pipe?
Heavy-wall caps can be supplied in many sizes, but manufacturability depends on outside diameter, exact wall, construction route and quantity. Provide the pipe dimensions for review.
Which coatings are available?
Bare finish, anti-rust oil, black paint and project-specific coating systems are common options. Coating compatibility and weld-area requirements should be specified.
Can NDE be arranged?
はい. MT, ユタ州, RT, hardness testing and third-party inspection can be arranged when the method, extent and acceptance criteria are stated in the order.
Request an A234 WPB butt weld cap quotation
Send the NPS, スケジュール, 量, surface protection and inspection requirements for a fast technical and commercial offer.
