| 摘要 |
A cylinder (10) for pressurised gas, the cylinder (10) being defined by a wall and being closed at one end and having an access valve (16) at the opposite end, the access valve (16) comprising a valve stem (20) which is biased closed onto a seat by a biasing member (28) and is openable by being displaced against the biasing member (28). The cylinder wall is formed from first and second shells (12;14).One of the shells (12) has a folded wall portion (18) that is folded back on itself to create a double wall thickness. The other shell (14) has a portion overlapping the folded wall portion (18) and the two shells (12;14) are welded in the region of the folded wall portion (18) to create a triple wall thickness (19) in this region. |
