ASTM-American society for Testing and Material(美國材料試驗協會)
ASTM A53 黑色的或熱鍍鋅的無縫碳鋼管和焊接鋼管標準 文件下載
Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless#無縫鋼管##焊接鋼管##鋼管生產##鋼管加工##鋼管標準#
A53 A53M-02 黑色的或熱鍍鋅的無縫碳鋼管和焊接鋼管標準.PDF
A53/A53M-04 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless.pdf