Essential Standards for Valve Production Quality ControlI. Welding Procedure Qualification Standards

1. ASME Boiler and Pressure Vessel Code, Section IX

• Qualification Standard for Welding, Brazing, and Fusing Procedures

• Requirements for Welders, Brazers, and Welding Operators

• Mandatory for pressure-retaining valve components The main gate valves product names of China gate Valve Network include:Inside Screw Non-rising Stem Wedge Gate Valve,Insulation Jacket Gate Valve,Lined Gate Valve,MZ44W Rising Stem Gas Quick Open&close ParallelMZ48W Manual Non-rising Stem City Gas Quick Gate Valve,Manual Knife-shaped Gate Valve,Manual Slurry ValveManual Wedge Copper Gate Valve,Manual Vacuum Isolated Wedge Gate Valve,Manual Welding Vacuum Wedge Gate Valve

2. EN 288-3 Specification and Approval of Welding Procedures

• Welding procedure tests for steel arc welding

• Essential for valves supplied to European markets

3. EN 287-1 Qualification Test of Welders

• Fusion welding approval testing for steel welders

• Ensures workforce competency in welding operations

II. Nondestructive Testing Standards

Core Standard: ASME Section V

• Comprehensive NDT methods including:

  • Radiographic Testing (RT)

  • Ultrasonic Testing (UT)

  • Magnetic Particle Testing (MT)

  • Liquid Penetrant Testing (PT)

  • Visual Examination (VT)

Ultrasonic Testing Specifications:

• ASTM A388/A388M: Practice for Ultrasonic Examination of Steel Forgings

• ASTM A609/A609M: Ultrasonic Examination of Castings (Carbon, Low-Alloy, and Martensitic Stainless Steel)

• ASTM A435/A435M: Straight-Beam Ultrasonic Examination of Steel Plates

• ASTM A577/A577M: Shear Wave Ultrasonic Examination of Steel Plates

• Do you still need to know or purchase the following gate valve products:

• • MZ48W Manual Non-rising Stem City Gas Quick Gate Valve
  • Manual Knife-shaped Gate Valve
  • Manual Slurry Valve
  • Manual Wedge Copper Gate Valve
  • Manual Vacuum Isolated Wedge Gate Valve