原帖由 chenjianming327 于 2007-11-9 09:24 發表 ![]()
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, P: L# ]! i- \" |# J/ Q5 b你什么意思?9 p3 v5 z4 k7 a2 m- `
ASTM A513-07 Standard Specification for Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing1 h ]; h0 a, I7 {0 C+ P
1. Scope- f( Q$ b, p P; Z9 B
1.1 This specification covers electric-resistance-welded carbon and alloy steel tubing for use as mechanical tubing.
. m& f. x8 e$ l" T, {1.2 This specification covers mechanical tubing made from hot- or cold-rolled steel.
& [/ p* I; q; w8 Q z0 j5 R1.3 This specification covers round, square, rectangular, and special shape tubing. Type | Size Range(Round Tubing) | Electric-Resistance-Welded Tubing from Hot-Rolled Steel | outside diameter from 1/2 to 15 in. (19.0 to 381.0 mm) | | wall from 0.065 to 0.650 in. (1.65 to 16.50 mm) | Electric-Resistance-Welded Tubing from Cold-Rolled Steel | outside diameter from 3/8 to 12 in. (9.92 to 304.8 mm) | | wall from 0.022 to 0.134 in. (0.71 to 3.40 mm) |
9 d b! T% |2 e1.4 Optional supplementary requirements are provided and when desired, shall be so stated in the order.
" I. g+ g+ ]: E, t1.5 The values stated in inch-pound units are to be regarded as the standard. |