"API 650 Clause 4.2.2 a) ASTM A36M/A36 for plates to a maximum thickness of 40 mm (1.5 in.). None of the specifications for the appurtenant materials listed in Table 1 of ASTM A36M/A36 are considered acceptable for tanks constructed under this standard unless it is expressly stated in this standard that the specifications are acceptable."
I would like to know ,what is appurtenant materials?
I know shell plates, bottom plates, annular plates. But I am clueless about appurtenant material. Appurtenant is different from shell,annular and bottom plates or it is a general terminology to mention the plate used for shell,annular and bottom? I am new to API 650 code and heavily working in it to understand the code.Any experienced hand in tank design or fabrication can help me to understand my doubt.
Thanks
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