不锈钢焊管ASTM A358标准中1-5类焊缝的要求？

1.3 Five classes of pipe are covered as follows:

下列包括5种类别的钢管 

1.3.1 Class 1—Pipe shall be double welded by processes employing filler metal in all passes and shall be completely radiographed.

1类 钢管采用所有焊道填充金属的双面焊，并完全经过射线检查。

1.3.2 Class 2—Pipe shall be double welded by processes employing filler metal in all passes. No radiography is required.

2类  钢管采用所有焊道填充金属的双面焊，不需要射线检查。

1.3.3 Class 3—Pipe shall be single welded by processes employing filler metal in all passes and shall be completely radiographed.

3类  钢管采用所有焊道填充金属单面焊，并完全经过射线检查。

1.3.4 Class 4—Same as Class 3 except that the weld pass exposed to the inside pipe surface may be made without the addition of filler metal (see 6.2.2.1 and 6.2.2.2).

4类 和三类相同，只是焊道暴露于钢管内壁，可能没有填加填充金属。 

1.3.5 Class 5—Pipe shall be double welded by processes employing filler metal in all passes and shall be spot radiographed.

5类 钢管采用所有焊道金属填充的双面焊，应进行缺陷射线检测 

1.4 Supplementary requirements covering provisions ranging from additional testing to formalized procedures for manufacturing practice are provided. Supplementary Requirements S1 through S6 are included as options to be specified when desired.