Chloride-assisted stress-corrosion cracking in Type 316 stainless steel water and gas-sampling tubes from the HYGAS pilot plant: failure analysis report

Technical Report · Thu Dec 01 00:00:00 EST 1977

DOI:https://doi.org/10.2172/6848319· OSTI ID:6848319

Danyluk, S.; Dragel, G. M.

Leaking cracks were observed in 1.27- and 0.64-cm OD Type 316 stainless steel water and gas-sampling tubes at the HYGAS pilot plant. The cracks that occurred in three tubes, predominantly near bends, were branched transgranular. The failures are attributed to chloride-assisted stress corrosion. Asbestos insulation used to weather strip the tubes is suspected as the source of the soluble chlorides in the failures of tubes LT-342 and No. 6411. Also, an aqueous environment was provided by occasional drenching of the insulation by city water and exposure to the weather. Stresses were attributed to internal pressure and residual stresses at the bends. Chlorides in the city water contributed to the failure of tube LT-477.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 6848319
• Report Number(s): ANL/MSD/FE-77-9
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
HYGAS PROCESS
PILOT PLANTS
STAINLESS STEEL-316
STRESS CORROSION
CHLORIDES
COAL GASIFICATION
FAILURE MODE ANALYSIS
RECOMMENDATIONS
TUBES
ALLOYS
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION
CORROSION RESISTANT ALLOYS
FUNCTIONAL MODELS
GASIFICATION
HALIDES
HALOGEN COMPOUNDS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
SNG PROCESSES
STAINLESS STEELS
STEELS
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification
360105 - Metals & Alloys- Corrosion & Erosion