UNE-EN 4552:2015 Aerospace series - Pipe coupling 37°, spherical, in heat resisting steel - Straight nipples, welded end - Inch series (Endorsed by AENOR in September of 2015.)
2015UNE-EN 4552:2015 Aerospace series - Pipe coupling 37°, spherical, in heat resisting steel - Straight nipples, welded end - Inch series (Endorsed by AENOR in September of 2015.)