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Change of name
Pipeline (Pipeline) changed to pipeline (Piping)
Pipeline: often refers to the buried long-distance transportation of oil and gas pipeline system.
Pipeline: often refers to a or a number of a certain variety of a certain length of pipe.
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changes in the cited standards
1, the new referenced standards API 6DX "pipeline valve actuator and installation standards", API6FA "Valve Fire Resistance Test Specification", API 6FD "Check Valve Fire Resistance Test Specification", API 607 "turn 1/4 week valves and non-metallic seat valves of the fire type test requirements," the requirements of the API6D valve actuator supporting the design, installation, and use of the valve should be guided by the API 6DX /6FA/6FD/607 and other standards.
2, add NACE MR 0175-2005 "oil and gas industry - oil and gas production under the environment of sulfur dioxide material selection" standard. This standard is a material selection standard, deleting NACETM 0284 "Standard Test Methods - Pipeline Steel and Pressure Vessels for Hydrogen Cracking Resistance". Material selection standards to replace the material test standards. This is important to the valve manufacturer, API 6D standard requirements according to the standard NACE MR0175 selection of hydrogen sulfide-resistant materials, in general, and does not put forward to the standard recognized materials and then repeated to do the test requirements.
3, added "ASME Boiler Pressure Vessel Code, Volume II, Part D: Mechanical Properties". This is the 23rd edition of the standard to increase ASME VIII (1), (2) the natural derivation of the design criteria, that is, the design of materials and related mechanical properties and permissible stresses according to ASME Volume II, Part D to determine.
4, increase ISO 6892-1 tensile test standards and ISO15614-7 welding test of metal materials Part 7 cladding process evaluation standards.
5, alternative: the original ASMT A388, ASTM A435 on ultrasonic testing methods standardized with ASTMA578A/A578M, ASTMA609/A609M standard replacement;
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changes in terminology and definitions
Terminology from the old version of 36 or (38) increased to the new version of 50
1, add "block and bleed valve (blockandbleed valve BB)";
Change the definition of "pressurized parts" to clarify that the pressurized parts of a valve include at least the valve body, end connections, bolts/bonnet and stem, and that the stem is a pressurized part;
3,Define the shaft (s h a f t ) and stem (stem), and make a distinction between them;
4, Pressure Class (Pressure Class) is defined as the rated pressure level defined by ASMEB16.34, with "Class" followed by a number to indicate. Delete the original standard ASME rated class (ASMErating class) this reference; delete the nominal pressure (PN) level (nominal pressure) this reference, so that API 6D and ISO are not related;
5, add the definition of the term welding: the activities of parts, components and assembly. This is the all-welded valve welding is considered to be the process of total assembly.
6, add symbols and abbreviations
BB-Block and Bleed (Block and Bleed)
QSL-QualitySpecification Level (QualitySpecification Level)
TC-test rod (Visual Test)
Deleted: HV-Vickers Hardness
