Fitness for service applications for equipment in wet H{sub 2}S services

Conference · Sun Dec 01 04:00:00 EST 1996

OSTI ID:403541

Bagnoli, D L; Yin, H ^[1]; Walker, S T ^[2]; Milton, D J ^[3]

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1. Mobil Technology Co., Paulsboro, NJ (United States)
2. Mobil Oil Corp., Joliet, IL (United States)
3. Mobil Oil Corp., Chalmette, LA (United States)

Today there is an increasing interest in fitness for service (FFS) applications for pressurized equipment in wet H{sub 2}S service in the refining industry. For many years inspections on pressure vessels in this service have revealed various types of damage including blisters, hydrogen induced cracking (HIC) as well as linear, crack-like indications. The latter type flaw which is usually found near welds may be the result of either sulfide stress corrosion or a previously manufactured weld defect. For several years blisters and HIC damage have been assessed using various rules of thumb extracted from the pressure vessel code and industry based recommended practices. More recently new methods have been developed which are based on fracture mechanics and local thinning analyses. Hydrostatic tests conducted by Mobil on pressure vessels with wet H{sub 2}S damage have provided validation of these methods. Some examples are provided where these methods have been applied to maintain equipment in service.

• OSTI ID: 403541
• Report Number(s): CONF-960706--; ISBN 0-7918-1783-0
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
36 MATERIALS SCIENCE
CORROSIVE EFFECTS
HYDROGEN EMBRITTLEMENT
HYDROGEN SULFIDES
NONDESTRUCTIVE TESTING
PETROLEUM REFINERIES
PRESSURE VESSELS
STRESS CORROSION