説明
Factory-made butt-welding pipe fitting
ASTM A403 WP304L Stainless Steel Pipe End Cap
An economical low-carbon stainless steel butt-weld closure for hygienic, utility and general corrosion-resistant piping systems.
What is an ASTM A403 WP304L pipe end cap?
アン ASTM A403 WP304L pipe end cap is a factory-made wrought stainless steel fitting that closes the end of a butt-welded piping run. It has a contoured closed end, a cylindrical skirt and a weld preparation matched to the ordered pipe wall.
WP304L is the low-carbon version of 304 stainless steel and is widely specified for welded clean-service and general process equipment. It is a practical choice when broad corrosion resistance is required but the service does not justify the molybdenum-bearing WP316L grade.
WP304L pipe end cap specifications
| 製品タイプ | Stainless steel butt weld pipe end cap / BW cap |
|---|---|
| 材質仕様 | ASTM A403 WP304L |
| 材質の指定 | UNS S30403; 通常、EN と相互参照されます 1.4307 / X2CrNi18-9 |
| 寸法規格 | ASME B16.9; MSS SP-43 option where applicable |
| 呼び径 | NPS 1/2–48 / DN15–DN1200, subject to wall and manufacturing route |
| 肉厚 | Sch 5S, 10S, 40S, 80S, 160, XXS and project-specific wall |
| 工事 | Seamless or welded as applicable and ordered |
| 終了準備 | Butt-weld bevel matched to pipe wall and project specification |
| 表面 | Pickled/passivated, solution-annealed finish or specified treatment |
| ドキュメント | EN 10204 3.1 MTC, ヒートトレーサビリティ, 注文時の寸法レポートと PMI |
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 A403 WP304L, ASME B16.9, NPS, パイプスケジュール, construction and weld-end preparation. State any supplementary testing or cleanliness requirement.
欧州プロジェクト
Specify the required EN grade such as 1.4307, DN, 壁の厚さ, dimensional standard and inspection-document type. Project and regulatory requirements must be listed explicitly.
WP304L vs WP316L pipe end cap
| 選定のポイント | WP304L | WP316L |
|---|---|---|
| 米国の指定 | S30403 | S31603 |
| Alloy difference | 18Cr-8Ni family without intentional molybdenum addition | Molybdenum-bearing austenitic stainless steel |
| Best value | General clean and mildly corrosive service | More demanding chloride-bearing or chemical service |
| Design caution | Verify chloride exposure and cleaning chemistry | Still requires a service-specific corrosion review |
代表的な用途
| 業界 | 代表的なサービス | Selection reason |
|---|---|---|
| 食べ物と飲み物 | Product transfer, clean utilities and equipment branches | Cleanable surface and familiar stainless material family |
| 医薬品 | Purified utility support and non-critical process lines | Low-carbon welded construction and documentation options |
| Water systems | Treated water, air and plant utility closures | 良好な一般耐食性 |
| 製造業 | Skids, 船舶, pumps and general process piping | Balanced cost, fabrication and durability |
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
Production can include forming, 溶体化熱処理, 較正, bevel machining, pickling/passivation and dimensional inspection. Cleanliness, surface finish and packaging should be defined when the application is hygienic.
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 is the difference between WP304 and WP304L?
WP304L has a lower maximum carbon content, which is commonly preferred for welded fabrication. The ordered ASTM A403 grade must be stated on the purchase specification.
Is WP304L suitable for chloride service?
Its suitability depends on chloride level, 温度, flow and crevice conditions. WP316L, duplex or super duplex may be more appropriate when localized corrosion risk is higher.
Are seamless and welded caps available?
Both construction routes may be available depending on size, wall and quantity. State a mandatory construction route in the RFQ if the project specification requires one.
How is the bevel selected?
The end preparation is matched to the ordered pipe wall and welding procedure. Provide the pipe schedule or exact wall thickness and any project bevel detail.
Which inspection documents are available?
EN 10204 3.1 MTC, dimensional inspection and heat traceability are commonly requested. PMI and additional NDE can be arranged when ordered.
Request a WP304L end cap quotation
Provide the size, スケジュール, 量, 工事, surface and documentation requirements for a complete technical offer.
