SY 5257-1991
Steel elbow (English Version)

Standard No.

SY 5257-1991

Language

Chinese, Available in English version

Release Date

1991

Published By

能源部

Status

Be replaced

Replace By

SY 5257-2012

Latest

SY 5257-2012

SY 5257-1991 history

• 1970 SY 5257-2012 Steel induction heating elbow for oil and gas transportation
• 1991 SY 5257-1991 Steel elbow