5.9.1(f) Joints. The number of mechanical joints in systems conveying flammable fluids is to be kept to a minimum. In general, flanged joints conforming to recognized standards are to be used.
5.9.1(g) Support and Alignment. Piping in which a mechanical joint is fitted is to be adequately adjusted, aligned and supported. Supports or hangers are not to be used to force alignment of piping at the point of connection.