What is the standard hydraulic test pressure for these fittings?

Fittings must withstand a hydraulic pressure of 5 MPa without leakage.

What thread standard is used for IS 1239 fittings?

Threads must conform to IS 554 (equivalent to ISO 7-1).

What is the coating requirement for galvanized fittings?

They must be hot-dip galvanized conforming to IS 4736 with a minimum zinc coating mass of 360 g/m2.

IS 1239 Part 2

: 2004

Mild steel tubes, tubulars and other wrought steel fittings - Part 2: Mild steel tubulars and other wrought steel pipe fittings

CurrentFrequently UsedSpecificationBIMMEP · Water Supply and Plumbing

Archive.org BIS Portal Google

This standard specifies the requirements for mild steel tubulars and wrought steel pipe fittings used for conveying water, non-hazardous gas, air, and steam. It covers dimensions, threading, galvanizing, and testing procedures for plumbing components like elbows, tees, sockets, and crosses.

Specifies requirements for mild steel tubulars and wrought steel pipe fittings suitable for use with pipes covered in IS 1239 (Part 1).

Quick Reference Values

hydraulic test pressure5 MPa

zinc coating mass minimum360 g/m2

chamfering angleApprox 65 degrees

Practical Notes

Fittings are threaded as per IS 554 (taper male and parallel or taper female threads) ensuring pressure-tight joints.

Always ensure compatibility between Part 1 (tubes) and Part 2 (fittings) regarding wall thickness and nominal bore.

For potable water or exposed systems, hot-dip galvanized fittings as per IS 4736 should be explicitly specified to prevent rapid corrosion.