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A403 WP304L-S Cap, B16.9 Low-Carbon Stainless Steel Butt Weld Fitting For Hydraulic Engineering

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A403 WP304L-S Cap, B16.9 Low-Carbon Stainless Steel Butt Weld Fitting For Hydraulic Engineering

Brand Name : YUHONG

Model Number : WP304L-S(SEAMLESS)

Certification : API, PED, ISO, TUV...

Place of Origin : CHINA

MOQ : 1PC

Price : Negotiable

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

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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

  • Hot pressing: Place the heated blank into the mold for stamping. For thin-walled pipe caps, to prevent wrinkling, a two-stage forming method is used: first stamping into a disc shape, and then finally forming.
  • Cold pressing: Pressing through a mold at room temperature, suitable for pipe caps with thin wall thickness or small size.
  • Subsequent processing: After forming, it is necessary to perform groove processing (for on-site welding, usually according to ASME B16.25 standard) and necessary shaping to ensure dimensional accuracy



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

  • Petroleum, Natural Gas, and Chemical Industry
  • Electricity and Energy
  • Food and Medicine
  • Ship and Ocean Engineering
  • water treatment

A403 WP304L-S Cap, B16.9 Low-Carbon Stainless Steel Butt Weld Fitting For Hydraulic Engineering

Product Tags:

Condensers Butt Weld Cap

      

WP304L Butt Weld Cap

      

Heat Exchanger Butt Weld Pipe Cap

      
Wholesale A403 WP304L-S Cap, B16.9 Low-Carbon Stainless Steel Butt Weld Fitting For Hydraulic Engineering from china suppliers

A403 WP304L-S Cap, B16.9 Low-Carbon Stainless Steel Butt Weld Fitting For Hydraulic Engineering Images

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