Цитата(DenissPek @ 23.5.2017, 8:53)

ASTM B338-14 "
Standard Specification for Seamless and Welded Titanium and Titanium Alloy Tubes for Condensers and Heat Exchangers"
Нажмите для просмотра прикрепленного файла (Identical with ASTM Specification B338-10e1 except 22.1, Product Marking, shall also show this
specification designation).