This standard specifies the maximum external leakage rates, which are acceptable for equipment used for welding, cutting and allied processes.  It applies to individual components which are used in the gas supply to a blowpipe from the connecting point of the hose (outlet of the cylinder valve or connecting point to a gas supply plant).  It does not apply to gas supply plants. 

• Year of Declaration: 1996
• Reference: ISO 9090: 1989
• Number of Pages: 4
• Code: GYS 149
• Version:
• ICS Number: 25.160.30