According to API 6A Table 62-bolting requirements for end flange (API 6A 2011 version),
If low temperature and sour service condition is required, there is only one option- A320/A320M L7M stud material.
For example, when working pressure is 69 Mpa, flange size is limited as below 4-1/16".
If flange size above 4-1/16" shall be used, which ASTM stud material is allowed?
Otherwise, this size is out of scope of API 6A?
It will be very appreciaed if you give me guideline for this case.
If low temperature and sour service condition is required, there is only one option- A320/A320M L7M stud material.
For example, when working pressure is 69 Mpa, flange size is limited as below 4-1/16".
If flange size above 4-1/16" shall be used, which ASTM stud material is allowed?
Otherwise, this size is out of scope of API 6A?
It will be very appreciaed if you give me guideline for this case.
