Hastelloy and Nickel Alloy Pressure Vessels

Hastelloy and other high-performance nickel alloys provide exceptional corrosion resistance for pressure vessels in the most demanding chemical environments. Roben Manufacturing engineers custom vessels from Hastelloy C-276, C-22, B-3, and other nickel-based alloys for applications involving oxidizing acids, reducing acids, chloride-bearing streams, and mixed chemical environments where stainless steels are inadequate.

Application Importance

Aggressive chemical processes require materials capable of resisting corrosion under conditions that would rapidly degrade standard stainless steels. Hastelloy alloys offer outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking across a wide range of chemical environments. Proper alloy selection based on specific process chemistry ensures long-term vessel integrity and eliminates corrosion-related contamination. Roben Manufacturing provides expert metallurgical guidance to select optimal nickel alloys for specific corrosion challenges.

Design Requirements

• Alloy selection based on corrosion data
• Qualified welding procedures for nickel alloys
• Proper heat treatment per alloy requirements
• Weld testing per ASME and customer specs
• Surface preparation and cleaning
• Specialized NDE techniques
• Documentation of alloy compliance
• Corrosion allowance considerations

Recommended Materials

• Hastelloy C-276 (universal resistance)
• Hastelloy C-22 (oxidizing environments)
• Hastelloy C-2000 (sulfuric/hydrochloric)
• Hastelloy B-3 (hydrochloric acid)
• Inconel 625 (high temperature)
• Monel 400 (hydrofluoric acid)
• Alloy 20 (sulfuric acid)

Industries Served

• Chemical Processing
• Pharmaceutical Manufacturing
• Pulp and Paper
• Flue Gas Desulfurization
• Waste Treatment
• Oil and Gas
• Specialty Chemicals

Certifications & Compliance

All Roben vessels are designed and manufactured in accordance with:

• ASME Boiler and Pressure Vessel Code Section VIII
• NACE MR0175/ISO 15156 (sour service)
• ASME B31.3 Process Piping
• PED (Pressure Equipment Directive)
• ISO 9001 Quality Management System

Roben Manufacturing Expertise

With over 65 years of pressure vessel fabrication experience, Roben Manufacturing has developed specialized expertise in nickel alloy vessel fabrication. Our welders are qualified to procedures specifically developed for high-performance alloys, utilizing proper filler metals, controlled heat input, and appropriate post-weld treatments. We maintain relationships with primary alloy suppliers to ensure material availability and authentic mill certifications.

Frequently Asked Questions

How is the correct Hastelloy grade selected?

Alloy selection is based on the complete range of process conditions including all chemicals, temperature ranges, concentration profiles, and potential upset conditions. We review published corrosion data, consult with alloy suppliers, and draw on our fabrication experience. For novel applications, corrosion testing may be recommended.

What special considerations apply to nickel alloy welding?

Nickel alloy welding requires proper joint preparation, matching or over-alloyed filler metals, controlled heat input, and appropriate interpass temperatures. Our procedures are qualified per ASME Section IX with additional testing for corrosion-critical applications.

Are nickel alloy vessels more expensive than stainless steel?

Yes, nickel alloys cost significantly more than stainless steel. However, the higher initial cost is often justified by extended service life, reduced maintenance, and elimination of corrosion-related failures in aggressive environments. Life-cycle cost analysis typically demonstrates value where conditions warrant nickel alloys.

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Request a Quote for Hastelloy and Nickel Alloy Pressure Vessels

Contact Roben Manufacturing to discuss your hastelloy and nickel alloy pressure vessels requirements.

Phone: (732) 364-6000

Email: sales@robenmfg.com

Address: 760 Vassar Avenue, Lakewood, NJ 08701

www.robenmfg.com