Malleable cast iron pipe fittings has been included in the mandatory ISI Certification Scheme under IS 1879:2010. This product cannot be exported/imported or sold in Indian consumer market without ISI Mark imprinted.

1. This standard covers requirements for the following types of malleable cast iron pipe fittings threaded in accordance with IS 554 for general purposes for the transmission of fluid and gas up to the limit of pressure and temperature specified in 3. These are indicated in following sections:

Section 1 General
Section 2 Elbows, including twin elbows, union elbows and side outlet elbows
Section 3 Tees including pitcher tees and side outlet tees
Section 4 Crosses
Section 5 Bends including long sweep bends and return bends
Section 6 Sockets
Section 7 Bushing and hexagon nipples
Section 8 Backnuts
Section 9 Caps and plugs and
Section 10 Unions

2. Dimensions not included in the standard are left to the manufacturer's discretion depending on the end use of the fittings.

3. These fittings shall be suitable for working pressure of up to 1.4 MPa in the case of water and up to 0.7 MPa in the case of steam, air, gas, and oil at a temperature not exceeding 100°C.