High Purity Piping

A Quality-Driven Process

Quality processes drive our fabrication procedures.

  1. Prior to bidding work we review the material specifications, approved vendor lists and welding code requirements for a better understanding of the customer’s quality expectations.
  2. Once awarded the work the quality team begins planning with approved vendors and manufacturers.
  3. Drawings are prepared per customer specifications identifying necessary codes, hold points, customer view points and required testing. Drawings are approved by the customer and then materials are ordered.
  4. Materials are inspected upon arrival to confirm they meet specifications and then labeled for 100% traceability / Mill Test Report (MTR) Tracking.
  5. Fabrication begins based upon approved drawings and specifications. Inspections are performed at each hold point per written procedures. Weld logs and maps are updated.
  6. Required testing and quality check offs are completed. Final preparations like painting and insulation are completed.

We Regularly Work to the Following Criteria

ASME / National Board Stamps

W. Soule maintains ASME  and National Board of Boiler and Pressure Vessel Inspectors certifications in three of our locations. This allows us to fabricate to the ASME/National Board Codes.

  • ASME PP power piping Stamp
  • ASME S power boiler Stamp
  • ASME U pressure vessel Stamp
  • National Board R repair and alteration Stamp

Weld Procedures

W. Soule’s weld procedures are qualified to the following codes of the  American Petroleum Institute (API), American Society Mechanical Engineers (ASME) and American Welding Society (AWS):

  • API 650 above ground storage tanks
  • API 1104 oil & gas industry piping
  • ASME Section IX boiler & pressure vessel
  • AWS D1.1 structural steel welding
  • AWS D1.6 structural welding stainless steel

Quality Team Certifications

Certified AWS, API and ASME Welding Procedures

  • FCAW (flux-cored arc welding)
  • MIG/GMAW/MAG (gas metal arc welding)
  • Orbital welding
  • SAW (submerged arc welding)
  • SMAW (shielded metal arc welding)
  • TIG/GTAW (gas tungsten arc welding)

Testing Procedures

  • Dye Penetrant Testing (PT)
  • Eddy Current Testing (ET)
  • Hydrostatic Pressure Testing
  • Leak Testing (LT)
  • Magnetic Particle Examination Testing (MT)
  • Phased Array (UT)
  • Radiography Testing (RT)
  • Shear Wave (UT)
  • Ultrasonic Testing (UT)


  • AMS QQ-P-35
  • ASTM A380
  • ASTM A967

Piping Codes

  • ASME B31.1 power piping
  • ASME B31.3 process piping


  • ASTM B912

Contact us to learn more about our quality program.

Client Testimonials

Contact W. Soule

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