NVA620 offshore steel plate, AB/AQ63 American Bureau of Shipping certification, A620 high-strength s

NVA620 offshore steel plate, AB/AQ63 American Bureau of Shipping certification, A620 high-strength s

NVA620 is a Det Norske Veritas certified offshore steel, and AB/AQ63 is an American Bureau of Shipping certified offshore steel.

NVA620 steel plate fixed rolling: Wugang Xiangyang

NVA620 steel plate is usually quenched and tempered, normalized, thermomechanically rolled + tempered A100

scope of application 101

This section stipulates the pressure boiler, heat exchanger, superheater, Requirements for seamless and welded steel pipes and accessories for chemical and cryogenic facilities.

102 products should comply with the corresponding ISO standards or recognized regional or national standards; However, the above standards should be comparable to the requirements of the ISo standards described in this section. These standards shall also meet the additional requirements of the following provisions.

A200 manufacturing

201 steel pipes and accessories should be manufactured by a factory approved by the company. Steel pipes and accessories can be manufactured by one of the following methods: --- hot-rolled seamless copper pipe

--- cold-drawn seamless steel pipe

--- resistance welding or high-frequency current welding--- cold-drawn resistance welding or high-frequency current welding--- arc welding

202 welded steel pipes and accessories shall not be used for occasions where the working pressure is higher than 32 bar or the design temperature is higher than 300 °C, and shall not be used for liquefied gas at a temperature lower than -10 °C. However, this is not the case if the weld is subjected to an automated non-destructive testing test. Welds along the entire length should be tested, and such pipes can be considered seamless.

203 The steel pipe as a structural strong member shall meet the requirements of the structural material (i.e., the hull structure and the mechanical structure material).

The grades specified in GB712-2011 structural steel standard for ships and marine engineering are: A, B, D, E, AH32, DH32, EH32, FH32, AH36, DH36, EH36, FH36, AH40, DH40, EH40, FH40, AH420, DH420, EH420, FH420, AH460, DH460, EH460, FH460, AH500, DH500, EH500, FH500, AH550, DH550, EH550, FH550, AH620, DH620, EH620, AH690, DH690, EH690, FH690

, China CCS USA ABS Germany GL France BV Norway DNV Japan NK UK LR Italy RINA KR in South Korea (DNV in Norway merged with Germany to: VL)