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March 31, 2015

DOT 4B CYLINDER – Regulations for Cylinders

DOT 4B CYLINDER CFR-2012-title49-vol3-sec178-50.pdf

Excerpt:

Manufacture. Cylinders must be manufactured using equipment and processes adequate to ensure that each cylinder produced conforms to the requirements of this subpart. No defect is permitted that is likely to weaken the finished cylinder appreciably. A reasonably smooth and uniform surface finish is required.