Tanım
Factory-made butt-welding pipe fitting
ASTM A403 WP316L Butt Weld Pipe Cap to ASME B16.9
A corrosion-resistant 316L stainless steel end closure with a weld bevel for high-integrity process, deniz, pharmaceutical and water-treatment piping.
Nedir ASTM A403 WP316L butt weld pipe cap?
Bir ASTM A403 WP316L pipe cap is a wrought austenitic stainless steel butt-welding fitting used to close the end of a pipe, header or branch permanently. Its contoured closed end and prepared weld bevel support a compact, leak-tight termination without a bolted joint.
WP316L combines low carbon content with molybdenum alloying. It is frequently selected where welded fabrication and localized corrosion resistance are more important than the lower initial cost of WP304L. Actual suitability must be checked against chloride level, sıcaklık, cleaning chemicals and the project corrosion allowance.
WP316L pipe cap specifications
| Ürün türü | Butt weld pipe cap / end cap / BW cap |
|---|---|
| Malzeme özellikleri | ASTM A403 WP316L |
| Malzeme tanımı | UNS S31603; genellikle EN ile çapraz referans verilir 1.4404 / X2CrNiMo17-12-2 |
| Boyutsal standart | ASME B16.9; MSS SP-43 option where applicable |
| Nominal boyut | NPS 1/2–48 / DN15–DN1200, subject to material, wall and manufacturing route |
| Duvar kalınlığı | Sch 5S, 10S, 40S, 80S, 160, XXS and project-specific wall |
| Yapı | Seamless or welded as applicable and ordered |
| Hazırlığı sonlandır | Butt-weld bevel to the ordered piping specification |
| Yüzey | Pickled/passivated, solution-annealed finish or project-specific treatment |
| Dokümantasyon | EN 10204 3.1 MTC, ısı numarası izlenebilirliği, sipariş edildiğinde boyutsal rapor ve PMI |
Dimensions and tolerances follow the ordered standard and edition. Final pressure-temperature suitability is determined by the piping design code, malzeme, duvar kalınlığı, matching pipe and service conditions.
ASME and European project requirements
North American projects
Belirt ASTM A403 WP316L, ASME B16.9, NPS'ler, matching pipe schedule, yapı, bevel and supplementary examination. Include the pipe specification when an exact bore or special wall is required.
European projects
State the required EN material designation such as 1.4404, DN size, duvar kalınlığı, fitting dimensional standard, PED-related documentation if applicable and EN 10204 inspection certificate type.
WP316L vs WP304L pipe cap
| Seçim noktası | WP316L | WP304L |
|---|---|---|
| ABD tanımı | S31603 | S30403 |
| Molibden | Typically alloyed with molybdenum | No intentional molybdenum addition |
| Relative corrosion behavior | Better localized corrosion resistance in many chloride services | Good general corrosion resistance for less aggressive service |
| Tipik seçim | Kimyasal, deniz, water treatment and demanding hygienic service | Clean utilities, food processing and general industrial service |
Tipik uygulamalar
| Endüstri | Tipik hizmet | Selection reason |
|---|---|---|
| Kimyasal işleme | Process headers, drains and equipment branch closures | Corrosion resistance plus welded system integrity |
| Marine and water treatment | Seawater-adjacent and chloride-bearing utility lines | Improved pitting resistance versus 304L in many conditions |
| İlaç | Clean utilities and validated process support systems | Low-carbon weldability and traceable stainless construction |
| Yiyecek ve içecek | Cleaning circuits and corrosive product lines | Cleanable stainless surface and durable closure |
Application examples are guidance only. The project engineer must confirm material compatibility, korozyon payı, impact requirements and design-code compliance.
Üretme, muayene ve dokümantasyon
The manufacturing route may include forming, çözelti ısıl işlemi, weld processing where applicable, kalibrasyon, bevel machining, pickling/passivation and final inspection. PMI and surface-condition requirements should be stated at quotation stage.
Heat-number control and MTC review against the purchase specification.
Dış çap, toplam uzunluk, duvar kalınlığı, ovality and bevel geometry checked as ordered.
PT, MT, UT, 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.
Teklif talebi kontrol listesi
- Material grade and product specification
- Dimensional standard and edition
- NPS or DN size
- Pipe schedule or exact wall thickness
- Dikişsiz veya kaynaklı yapı, gerektiğinde
- End preparation and bevel detail
- Quantity and delivery destination
- MTC, NDE and third-party inspection requirements
Sık sorulan sorular
What does WP316L mean?
WP316L identifies a wrought austenitic stainless steel fitting grade under ASTM A403. UNS S31603 is the corresponding alloy designation.
Yapmak ASME B16.9 define the material?
HAYIR. ASME B16.9 primarily addresses dimensions, toleranslar, derecelendirmeler, testing and marking for factory-made wrought butt-welding fittings. ASTM A403 defines the stainless steel material requirements.
Which schedules can be supplied?
Common requirements include Sch 5S, 10S, 40S and 80S, with heavier or project-specific walls available subject to size and manufacturing route.
Is WP316L always suitable for seawater?
No material should be selected from grade name alone. Sıcaklık, chloride concentration, akış, crevices and cleaning chemistry must be reviewed; duplex or super duplex may be preferred for more severe service.
Can PMI and EN 10204 3.1 documents be supplied?
Evet, when included in the purchase order. Heat-number traceability, EN 10204 3.1 sertifikasyon, PMI and dimensional inspection can be supplied to the agreed inspection plan.
Request a WP316L pipe cap quotation
Send the NPS or DN, takvim, miktar, yapı, bevel and inspection requirements for a project-specific quotation.
