SS-EN-4552 Complete Document History
Aerospace series - Pipe coupling 37°, spherical, in heat resisting steel - Straight nipples, welded end - Inch series

Complete Current Edition:
   2015 EDITION - ENGLISH LANGUAGE EDITION - July 27, 2015

Obsolete Revision Information:
   EDITION 1 - ENGLISH LANGUAGE EDITION - March 21, 2003