Yuhong Group Co.,Ltd
| Payment Terms | T/T, L/C at sight |
| Supply Ability | 10000 pcs per month |
| Delivery Time | Depends on quantity |
| Packaging Details | PLY-WOODEN CASE OR PALLET |
| Specification | ASTM A403 |
| Materials | WP304L / UNS S30403 |
| Dimension Standard | ASME/AISI B16.9 |
| Size | 1/2" - 24" |
| Schedule | e.g., Sch 10S, Sch 40S, Sch 80S) indicates wall thickness. |
| NDT | UT/PT/RT/MT |
| Surface treatment | Acid washing/sandblasting/rolling/polishing |
| Key words | Stainless Steel 304L Buttweld Pipe Cap UNS S30403 |
| Brand Name | YUHONG |
| Model Number | WP304L-S(SEAMLESS) |
| Certification | API, PED, ISO, TUV... |
| Place of Origin | CHINA |
View Detail Information
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Product Specification
| Payment Terms | T/T, L/C at sight | Supply Ability | 10000 pcs per month |
| Delivery Time | Depends on quantity | Packaging Details | PLY-WOODEN CASE OR PALLET |
| Specification | ASTM A403 | Materials | WP304L / UNS S30403 |
| Dimension Standard | ASME/AISI B16.9 | Size | 1/2" - 24" |
| Schedule | e.g., Sch 10S, Sch 40S, Sch 80S) indicates wall thickness. | NDT | UT/PT/RT/MT |
| Surface treatment | Acid washing/sandblasting/rolling/polishing | Key words | Stainless Steel 304L Buttweld Pipe Cap UNS S30403 |
| Brand Name | YUHONG | Model Number | WP304L-S(SEAMLESS) |
| Certification | API, PED, ISO, TUV... | Place of Origin | CHINA |
| High Light | Condensers Butt Weld Cap ，WP304L Butt Weld Cap ，Heat Exchanger Butt Weld Pipe Cap | ||
A403 WP304L-S Cap, B16.9 Low-Carbon Stainless Steel Butt Weld Fitting For Hydraulic Engineering
Overwiew
A403 WP304L stainless steel seamless cap is a pressure-containing component used to close the end of a piping system, manufactured in strict compliance with ASME B16.9 dimensional standards. It features a "seamless structure" to eliminate potential weld line defects and undergoes solution annealing treatment to restore the excellent intergranular corrosion resistance of low-carbon austenitic stainless steel (304L). It is particularly suitable for pressure piping systems with extremely high requirements for corrosion resistance and hygiene, such as those in the petrochemical, nuclear power, food, and pharmaceutical industries.
Forming process of Stainless steel cap
Due to being a "seamless" pipe cap, its manufacturing usually starts from steel pipes or plates and is processed through plastic forming, with the main process being stamping
Chemical Composition of A403 WP304L Cap
| Grade | C | Ni | Si | N | S | Mn | P | Cr | Mo | |
| SS 304L | min. | - | 8.0 | - | - | - | - | - | 18.0 | - |
| max. | 0.030 | 12.0 | 0.75 | 0.10 | 0.030 | 2.0 | 0.045 | 20.0 | ||
Mechanical Properties of ASTM A403 WP304L Cap
| Grade | Tensile Strength (MPa) min | Elongation (% in 50mm) min | Yield Strength 0.2% Proof (MPa) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| SS 304L | 485 | 40 | 170 | 92 | 201 |
Equivalent Grades of WP304L
| STANDARD | UNS | WERKSTOFF NR. | AFNOR | EN | JIS | BS | GOST |
| SS 304L | S30403 | 1.4306/1.4307 | Z3CN18‐10 | X2CrNi18-9 / X2CrNi19-11 | SUS 304L | 304S11 | 03Х18Н11 |
Inspection for A403 WP304L-S Cap
| Inspection Category | Specific Inspection Items | Brief Description |
|---|---|---|
| Raw Material Inspection | Chemical composition analysis, Mechanical property testing | To verify that the material meets WP304L standards (e.g., low carbon requirements) and ensure the strength is up to specification. |
| Non-Destructive Examination (NDE) | Ultrasonic Testing (UT), Penetrant Testing (PT), Radiographic Testing (RT), Magnetic Particle Testing (MT) | To detect the presence of internal or surface defects such as cracks and laminations. This is the core of quality control for WP grade seamless caps. |
| Dimension & Visual Inspection | Dimensional inspection, Wall thickness measurement, Visual surface examination | To ensure dimensions comply with standards such as ASME B16.9, wall thickness is uniform, and the surface is free from imperfections that would affect service. |
Application field
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2007
Total Annual:
50M-70M
Employee Number:
50~850
Ecer Certification：
Verified Supplier
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou... Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...
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