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Custom ASME Pressure Vessels & Tanks in McKeesport, PA
George Marker & Sons has built a legacy spanning three generations in the pressure vessel and boiler industry. Our team transitioned from hands-on fabrication to advanced engineering while maintaining a commitment to quality and delivery excellence. We hold multiple ASME code stamps, including 'S' for high pressure boilers and 'U' for unfired pressure vessels. Our comprehensive capabilities include in-house design using ASME software, certified welding, and non-destructive testing through partnerships.

With over three decades of experience, we combine technical expertise with personalized service to meet exacting specifications. Our dedicated workforce ensures every project adheres to rigorous quality control standards while delivering competitive pricing. As a trusted McKeesport-based manufacturer, we guarantee on-time completion for vessels ranging from small portable units to massive industrial systems.
Services
Pressure Vessels Heat Exchangers Piping Systems Tanks Fabrication ASME Code Repairs
Highlights and features
  • Three generations of pressure vessel fabrication expertise
  • Full in-house ASME design and seismic engineering capabilities
  • 100% delivery commitment guarantee
  • Fully audited quality control program for shop and field operations
  • Certified welders for carbon steel, stainless steel, and alloys
Associations and certifications
  • ASME Code Stamps (S, U, H, R)
  • Hartford Steam Boiler Insurance and Inspection Agency
Services
Pressure Vessels
Custom-engineered pressure vessels built to ASME Section VIII Division I requirements. Capable of manufacturing carbon steel, stainless steel, and alloy vessels for water filtration, chemical processing, and petroleum applications. Comprehensive quality control ensures compliance with seismic design standards and national board registration.
Heat Exchangers
Complete heat exchanger services including retubing, shell replacement, and full rebuilds. Specialized in U-tube bundles, baffle plates, and water box components. Repairs performed at our facility or customer site using certified ASME Section IX welders for optimal thermal efficiency.
Piping Systems
ASME code-compliant piping fabrication and installation for boiler rooms, air lines, and process systems. Our certified welders construct pipe skids and complex distribution networks with precision. Capable of handling high-pressure applications up to 10,000 PSI hydrostatic testing.
Tanks Fabrication
Custom tank manufacturing for deaerator, blowdown, and air receiver applications. Available in horizontal or vertical configurations with support structures. Constructed using 500AMP MIG welders and tested through soap inspection methods to ensure leak-proof integrity.
ASME Code Repairs
Authorized ASME 'R' stamp repairs for pressure vessels and boilers. Performing alterations and welded repairs under strict quality control. Utilizing Hartford Steam Boiler inspection agency for code compliance and providing hydrostatic testing documentation up to 10,000 PSI.
People
George Marker
Founder
Founded the company in the 1970s, establishing a legacy of pressure vessel fabrication excellence. Transitioned from hands-on welding to pioneering in-house engineering capabilities while maintaining strict quality standards.
Barry George Marker
Second Generation
Carried forward the family tradition, expanding the company's engineering capabilities and securing multiple ASME code stamps. Instrumental in implementing comprehensive quality control systems for both shop and field operations.
Questions
What industries does George Marker & Sons serve?
We serve chemical processing, petroleum, water filtration, mining, and food processing industries with custom pressure vessel solutions built to ASME standards.
Can you fabricate vessels to specific customer designs?
Yes, we build vessels to both customer specifications and in-house engineered designs, including supports for horizontal or vertical configurations.
What ASME code stamps do you hold?
We maintain 'S' (high pressure boilers), 'U' (unfired pressure vessels), 'H' (low pressure boilers), and 'R' (welded repairs) ASME code stamps.
How do you ensure quality control?
We operate a fully audited quality control program covering shop and field operations, with third-party inspections from Hartford Steam Boiler Agency.
What vessel sizes can you manufacture?
We produce vessels from compact units fitting pickup trucks to massive systems requiring rail or barge transportation, with no weight limit constraints.
Do you offer on-site repairs?
Yes, our certified welders perform heat exchanger and piping repairs at customer facilities following ASME Section IX welding procedures.