JGT251-2017······1

1 范圍······4

2 規范性引用文件······4

3 術語和定義······5

4 分類、代號及標記······7

5 材料和配件······8

6 要求······8

7 試驗方法······12

8 檢驗規則······12

9 標志、包裝、運輸和貯存······13