katalor’s SSCC test about ASTM A106 Gr B steel pipe

ASTM 106 Gr B steel used in the heavy chemical plant is degraded by corrosive environments such as the chlorides, the sulfides, and pH in the crude oil. In addition, ASTM A106 Gr B steel pipe is damaged during service by various corrosion mechanisms. It is particularly remark- able in the line of crude oil transportation and so on . the bellowing is theSSCC test about ASTM A106 Gr B steel pipe.

Table1.SSCC test condition about ASTM A106 Gr B steel pipe Static load (0.8σy)

Table 2. SSCC test result about ASTM A106 Gr B steel pipe

Conclusion about SSCC test about ASTM A106 Gr B steel pipe

As a fundamental investigation for providing in- formation on welding design and reliability of the ASTM A106 Gr B steel pipes, sulfide stress corrosion crack- ing of the ASTM A106 Gr B steel pipes with different weld- ing processes was assessed under 5.0wt.% NaCl+ 0.5wt.% CH3COOH solution at room temperature and static stress level of 0.8σy for 720 hrs. From these results, the conclusions are as follows.

1.For ASTM A106 Gr B steel pipe weld, it is expected that the GTAW+FCAW welding process is the most recommended, considering the SSCC reliability and environmental design

2.The failure at HAZ of the weld is due to the complicated reaction of welding residual stresses and SSCC mechanism.
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