Hess Services is ISO 9001:2015 certified and maintains a comprehensive portfolio of ASME and API certifications supporting the fabrication, repair, and servicing of pressure vessels, tanks, boilers, and oilfield equipment.

Our certifications demonstrate compliance with recognized industry standards and support the quality, safety, and performance expectations of customers across the energy, industrial, and infrastructure sectors.

ASME Certifications

ASME U Stamp
Pressure vessel fabrication in accordance with ASME Boiler and Pressure Vessel Code Section VIII.

ASME R Stamp
Repairs and alterations of pressure-retaining equipment under National Board authorization.

ASME S Stamp
Construction of power boilers and related ASME code work.

ASME H Stamp
Fabrication of heating boilers in accordance with ASME requirements.

API Certifications

API 12F
Shop welded production tanks used in oil and gas service.

API 650
Welded storage tanks for petroleum, chemical, water, and industrial applications.

API Q1
Quality management system for manufacturing organizations serving the oil and natural gas industry.

Quality Management

ISO 9001:2015
Internationally recognized quality management system supporting consistent processes, documentation, and continuous improvement.

Contractor Compliance & Industry Programs

ISNetworld Contractor Member

Copies of current certificates are available below.

ASME-U

API Q1

API-650

Contractor Compliance & Industry Programs

ISNetworld Membership