ASME SA-20的钢板如何计算理论重量？是否是取最大厚度最小厚度平均值？

tom6452

请教：GB713有规定，钢板的计重“理论计重采用的厚度为钢板允许的最大厚度和最小厚度的算术平均值。计算用钢板密度为7.85g/cm3”
那么问题来了，请问，ASME SA-20钢板的重量又是怎样计算？ASME SA-20里面是否有规定？我还找不到相关要求，麻烦各位大神解答下。多谢！

tom6452

我指的是计算“理论重量”

tom6452

求各位大神指点下，在线等。

lyklzy

tom6452 发表于 2018-7-5 11:34
求各位大神指点下，在线等。

ASME BPVC SECTION II MATERIALS Part A
Ferrous Material Specifications(Beginning to SA-450)
SA-20/SA-20M SPECIFICATION FOR GENERAL REQUIREMENTS FOR
STEEL PLATES FOR PRESSURE VESSELS
Page 74
14. Permissible Variations in Dimensions or Mass
14.1 One cubic foot of rolled steel shall be assumed to
weigh 490 lb, unless otherwise stated in the applicable product
specification. One cubic metre of rolled steel is assumed to
have a mass of 7850 kg, unless otherwise stated in the
applicable product specification.
14.2 For carbon steel plates the permissible variations for
dimensions shall not exceed the applicable limits stated in
Annex A1, Table A1.1 to Table A1.9, and Table A1.13 [Annex
A2, Table A2.1 to Table A2.9, and Table A2.13].
14.3 For alloy steel plates the permissible variations for
dimensions shall not exceed the applicable limits stated in
Annex 1, Table A1.1 to Table A1.4, Table A1.8, and Table
A1.10 to Table A1.13. [Annex 2, Table A2.1 to Table A2.4,
Table A2.8 and Table A2.10 to Table A2.13].
14.4 Conversions of Permitted Variations from Fractions of
an Inch to Decimals—Permitted variations in dimensions for
products covered by this specification are generally given as
fractions of inch and these remain the official permitted
variations, where so stated. If the material is to be measured by
equipment reporting dimensions as decimals, conversion of
permitted variations from fractions of an inch to decimals shall
be made to three decimal places; using the rounding method
prescribed in Practice E29.

tom6452

lyklzy 发表于 2018-7-5 15:33
ASME BPVC SECTION II MATERIALS Part A
Ferrous Material Specifications(Beginning to SA-450)
SA-20 ...

多谢！不过貌似这段话里面也没讲到如何计算理论厚度吧？只说了密度。

lyklzy

tom6452 发表于 2018-7-6 07:57
多谢！不过貌似这段话里面也没讲到如何计算理论厚度吧？只说了密度。

有了密度，知道了长度和宽度，就可以算出厚度。

tom6452

lyklzy 发表于 2018-7-6 08:48
有了密度，知道了长度和宽度，就可以算出厚度。

非也，那我问一句，厚度你如何选择？