壳牌2011年的新标准
一、DEP61.40.20.30-Gen 2011 Welding of pipelines and related facilities（amendments/supplements to ISO 13847:2000）二、DEP30.10.60.30-Gen 2011 Welding on pressurised pipes（对ANSIAPI RP STD 1104版的修改和补充）三、DEP 61.40.20.31-Gen 2011 Field welding of duplex and super duplex stainless steel pipelines (amendments/supplements to API 1104)
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