4.1
Steel sockets and tubular covered by this standard shall be designated by their nominal bore.
4.2
Other steel fittings shall be designated giving the following particulars in the sequence shown:
4.2.1 Type of Fittings
The types of fittings are denoted as elbow, tee, cross, etc.
| 1 | |
|---|---|
| a) | Type of fittings (see 4.2.1); and |
| b) | Size designation (see 4.2.2). |
IS 1239 (Part 2) : 2011 4.2.2 Size Designation
This is determined by the nominal bore, in millimetre of the pipe at the outlets.
4.2.2.1 Equal fitting
Where all outlets in a given fitting are of the same size, the fitting shall be referred to by that one size, irrespective of the number of the outlets.
4.2.2.2 Unequal fittings
These are referred to by the size of each outlet.