关于API 16c里面要求的硫化氢分压要求

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16C中产品产品最低要求DD，硫化氢分压大于10.34，满足NACE175，选用材料4130，除了硬度满足要求，是不是还要做ssc试验，材料是不是要写成DD-10.5或DD-NL？各位大神解解惑啊

asnt2012

对于4130，满足ISO 15156-2 附录A.2要求的材料不需要再做SSC试验，见ISO 15156 A2.1。
应标记H2S最大分压，对于满足附录A.2的材料，允许的最大H2S分压为1MPa.

yang7523518

asnt2012 发表于 2016-6-30 11:46
对于4130，满足ISO 15156-2 附录A.2要求的材料不需要再做SSC试验，见ISO 15156 A2.1。
应标记H2S最大分压 ...

非常感谢，在A2.2.3里描述到。如果硬度不超过26HRC，经在管状形态下淬火+回火处理的铬钼低合金钢（UNS G41XX0既AISI 41XX）材质的管和管组件是适用的。这些产品应通过硫化物应力开裂测试验证且应按照B.1节进行超声波检。这个里面提到应通过硫化物应力开裂测试验证。

asnt2012

yang7523518 发表于 2016-6-30 13:42
非常感谢，在A2.2.3里描述到。如果硬度不超过26HRC，经在管状形态下淬火+回火处理的铬钼低合金钢（UNS G4 ...

不超过22 HRC是不要做SSC的，大于22 HRC不超过26 HRC不强制要求做SSC，大于26 HRC不超过30 HRC才必须要做SSC

asnt2012

ISO 15156 2015.12.03的解释：
QUESTION:
We need a clarification on MR0175/ISO 15156 Part 2, Annex A. We are a manufacturer of temporary pipe work, flowlines, etc., for sour gas service in well testing and process use in a surface application.
As such we believe Paragraphs A.2.1 through A.2.4 and Table A.1 with a hardness limit of 22 HRC are applicable in these circumstances.
However, pipe suppliers in this region tell us that 26 HRC is acceptable in such applications. I believe the 26 HRC limit is only applicable to material used in a downhole application as in Paragraph A.2.2.3, etc. (i.e., not a surface application) and that this is in error in terms of our usage.
(MP INQUIRY #2005-23)
ANSWER:
ISO 15156-2, A.2.2.1 indicates that carbon and low alloy steels for use in any product form must comply with the requirements of A.2.1 which include the hardness requirement of maximum 22 HRC for the parent material. Exceptions to this rule are named specifically in other paragraphs of Annex A.
Welds in such materials shall comply with the requirements of A.2.1.4 that also refers to Table A.1 that sets hardness requirements for welds.
Sub-clause A.2.2.2 provides examples of materials that can comply with A.2.1, including some examples of tubular products in Table A.2.
Sub-clause A.2.2.3 addresses downhole components only.
The standard allows materials, such as AISI 4130, to be qualified at higher hardness than 22 HRC for possible use as pipe in sour service by laboratory testing in accordance with Annex B and Table B.1 or on the basis of field experience as described in ISO 15156-1, 8.2. Welds must be shown to comply with the requirements of Paragraph 7.3.3.4.

asnt2012

QUESTION:
We have a request for interpretation of item A.2.2.3.3 of ISO 15156-2. It states that “tubulars and tubular components made of Cr-Mo low alloy steels (UNS G41XX0, formerly AISI 41XX, and modifications), if quenched and tempered in the tubular form, are acceptable if the hardness does not exceed 26 HRC. These products should be qualified by SSC testing in accordance with B.1 using the UT test.”
We use AISI 4130 tubes in the quenched and tempered condition for drilling riser P-lines (choke, kill and booster lines) and have at present a hardness limit of HRC 22. The relaxation of above hardness requirement to HRC 26 would be helpful in production of the pipes as well as weldments.
(MP Inquiry #2010-04)

ANSWER:
Paragraph A.2.2.3.3 of ISO 15156-2 is applicable to downhole casing, tubing, and tubular components used in region 3 of the diagram in Paragraph 7.2. Materials for P-lines in drilling risers are not included in Paragraph A.2.2.3.3. Materials for P-lines used in Region 3 are hardness limited to HRC 22. The point you raise concerning Inquiry 2005-23 is valid since testing according to Table B.1 in Annex B is one of the accepted qualification methods. Testing can be used to qualify any material/application (including 4130/P-lines in drilling risers) provided it is performed according to ISO 15156 requirements.

asnt2012

UT Test：ISO 15156所说的UT不是超声检测（Ultrasonic Testing）,而是UT = Uniaxial Tensile 单轴向拉伸试验

asnt2012

yang7523518 发表于 2016-6-30 13:42
非常感谢，在A2.2.3里描述到。如果硬度不超过26HRC，经在管状形态下淬火+回火处理的铬钼低合金钢（UNS G4 ...

兄弟：哪个公司的？                  

yang7523518

asnt2012 发表于 2016-6-30 15:41
兄弟：哪个公司的？

清河的。

yang7523518

asnt2012 发表于 2016-6-30 15:24
QUESTION:
We have a request for interpretation of item A.2.2.3.3 of ISO 15156-2. It states that “t ...

Many Thanks。大哥太专业了