Part 3 of this British Standard specifies requirements for wrought seamless and fabricated carbon and ferritic alloy steel butt-welding pipe fittings for use in the petroleum industry, and is in metric units.
The following types of fittings are provided for:
45° long radius elbows;
90° long and short radius elbows;
90° long radius tangent elbows;
long and short radius return bends;
equal and reducing tees;
concentric and eccentric reducers;
caps;
lap-joint stub ends.
Welding-neck flanges are not included. They are included in BS 15601) and BS 32932).
Attention is drawn to Appendix A, which lists information to be supplied by the purchaser.