GB/T 20972.2-2008 in English

《GB/T 20972.2-2008石油天然气工业 油气开采中用于含硫化氢环境的材料 第2部分：抗开裂碳钢、低合金钢和铸铁》由TC96（全国石油钻采设备和工具标准化技术委员会）归口，主管部门为国家标准化管理委员会。
ＧＢ／Ｔ２０９７２的本部分给出了在油气开采及天然气处理厂含硫化氢（Ｈ２Ｓ）环境中，设备用碳钢和低合金钢的选择及评定的要求和推荐做法，这些设备的失效会对公众、个人健康和安全或环境造成危害。使用本部分有助于避免发生这种代价高昂的腐蚀破坏。本部分是对那些合适的设计规范、标准和准则的补充，但不能代替它们对材料的要求。本部分叙述了钢抗由硫化物应力开裂（ＳＳＣ）引起的破坏的性能以及应力定向氢致开裂（ＳＯＨＩＣ）和软区开裂（ＳＺＣ）的有关现象。 本部分还叙述了钢抗氢致开裂（ＨＩＣ）和可能发展成的阶梯裂纹（ＳＷＣ）的性能。 本部分只涉及开裂，不涉及均匀腐蚀（质量减少）或局部腐蚀造成的材料损失。

Scope

NOTE: Carbon steels, low alloy steels, and cast irons selected in accordance with this standard are resistant to cracking in the hydrogen sulfide-containing environments specified in oil and gas production, but not necessarily in all service environments. It is the responsibility of the equipment user to select the appropriate carbon steel, low alloy steel and cast iron for the intended service environment. This part of GB/T 20972 gives the requirements and recommended practices for the selection and evaluation of carbon steel and low alloy steel for equipment in the environment containing hydrogen sulfide (HS) in oil and gas extraction and natural gas processing plants. hazard to the public, personal health and safety, or the environment. Use of this section will help avoid this costly corrosion damage. This standard is a supplement to those appropriate design codes, standards and guidelines, but does not replace their requirements for materials. This part describes the resistance of steels to damage caused by sulfide stress cracking (SSC) and the related phenomena of stress-oriented hydrogen-induced cracking (SOHIC) and soft zone cracking (SZC). This section also describes the resistance of steels to hydrogen-induced cracking (HIC) and possible development of step cracks (SWC). This standard deals only with cracking and not with loss of material due to general corrosion (loss of mass) or localized corrosion.