HIC test requirements for A105N
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This post was last edited by chang0101 on 2009-12-11 21:07. There is a batch of flanges available, made of ASTM A105N material; the customer requires that the material meet NACE+HIC standards. I searched the Internet for a long time; NACE TM0284 only contains information on testing methods and similar things. I would like to know: 1. What levels of carbon C, sulfur S, and phosphorus P are required to meet the requirements for HIC? 2. Are there any requirements regarding hardness or other aspects? 3. Can ordinary A105N meet the requirements? Also, how much do such tests usually cost? If anyone knows, I would appreciate some guidance! Thank you, kaysuns@gmail.com
This post was last edited by realben on 2010-2-4 at 23:03. First of all, your three indicators—crack sensitivity ratio (CSR), crack length ratio (CLR), and crack thickness ratio (CTR)—must meet the required standards; the S and P contents should be as low as possible. Sulfur, on the other hand, forms non-metallic inclusions such as manganese sulfide and iron sulfide in steel, resulting in a looser microstructure in certain areas, which facilitates hydrogen-induced cracking in stress-corrosion environments. Low hardness can also reduce the tendency to hydrogen-induced cracking in a wet hydrogen sulfide stress corrosion environment. A post by a member of the marine industry reads: “S≤0.01%(Wt), P≤0.015%(Wt), and hardness not exceeding 180HB.” You can refer to NACE TM0177 for more details
1) Appendix to the Laboratory Accreditation Certificate of the China National Accreditation Service for Conformity Assessment (No. CNAS L0520): Name: Lanzhou Petroleum Drilling, Production, Refining and Chemical Equipment Quality Inspection Institute, Machinery Industry; Address: No. 349, Dunhuang Road, Qilihe District, Lanzhou City, Gansu Province; Issue date: February 22, 2009; Valid until: November 24, 2009. Standard: GB/T 8650-2006 – Method for evaluating resistance to hydrogen-induced cracking in pipeline steel and pressure vessel steel.
2) Scope of testing capabilities as per the laboratory accreditation by the China National Accreditation Service for Conformity Assessment (No. CNAS L1555): Name: Petroleum Pipe Testing Laboratory, Pipeline Research Institute of China National Petroleum Corporation; Address: No. 32, Yidian Second Road, Xi’an City, Shaanxi Province; Issue date: September 28, 2006; Valid until: June 1, 2010. Standard: GB/T 8650-2006 – Method for evaluating resistance to hydrogen-induced cracking in pipeline steel and pressure vessel steel.
3) Appendix to the Laboratory Accreditation Certificate of the China National Accreditation Service for Conformity Assessment (No. CNAS L1024): Name: Testing Center of Tianjin Steel Pipe Group Co., Ltd.; Address: No. 396, Jintang Highway, Dongli District, Tianjin City; Issue date: January 6, 2009; Valid until: January 5, 2012. Standards: NACE TM0284-2003 – Test method for evaluating resistance to hydrogen-induced cracking in pipeline and pressure vessel steel. Contact number: 022-24800491. Xi’an Moore Petroleum Engineering Laboratory. Issue date: October 31, 2008; Valid until: October 31, 2011. Standards: NACE TM0284-2003 – Test method for evaluating resistance to hydrogen-induced cracking in pipeline and pressure vessel steel; NACE TM 0177-2005 – Test for sulfide stress corrosion cracking. Phone number: 029-88252276
2) Scope of testing capabilities as per the laboratory accreditation by the China National Accreditation Service for Conformity Assessment (No. CNAS L1555): Name: Petroleum Pipe Testing Laboratory, Pipeline Research Institute of China National Petroleum Corporation; Address: No. 32, Yidian Second Road, Xi’an City, Shaanxi Province; Issue date: September 28, 2006; Valid until: June 1, 2010. Standard: GB/T 8650-2006 – Method for evaluating resistance to hydrogen-induced cracking in pipeline steel and pressure vessel steel.
3) Appendix to the Laboratory Accreditation Certificate of the China National Accreditation Service for Conformity Assessment (No. CNAS L1024): Name: Testing Center of Tianjin Steel Pipe Group Co., Ltd.; Address: No. 396, Jintang Highway, Dongli District, Tianjin City; Issue date: January 6, 2009; Valid until: January 5, 2012. Standards: NACE TM0284-2003 – Test method for evaluating resistance to hydrogen-induced cracking in pipeline and pressure vessel steel. Contact number: 022-24800491. Xi’an Moore Petroleum Engineering Laboratory. Issue date: October 31, 2008; Valid until: October 31, 2011. Standards: NACE TM0284-2003 – Test method for evaluating resistance to hydrogen-induced cracking in pipeline and pressure vessel steel; NACE TM 0177-2005 – Test for sulfide stress corrosion cracking. Phone number: 029-88252276
This post was last edited by phy0001 on 2010-5-21 at 11:07. Such tests can be conducted in many places, and the cost should not exceed 4,000 RMB. Our company once ordered a batch of such steel plates; the HIC tests were carried out at Northwestern Polytechnical University. Wuhan Iron and Steel Group, Pang Long: 13137747779