HB brand pipe fittings conform to the following specifications laid down by the Bureau of Indian Standards:

• Dimensions: Malleable cast iron pipe fittings as per IS:1879 - 1987 (Part I to X).
• Material: Black-heart malleable cast iron as per IS:14329 -1995 grade BM-300.
• Threads: Threaded as per IS:554-1999 parallel female and taper male threads to bear pressure tight joints.
• Finish: Hot dip galvanized finish tested in accordance with provisions mentioned in IS:2633-1986 & IS:6745-1972.

• Malleability: HB brand pipe fittings are manufactured under strict process controls in melting and heat treatment, which enable them to achieve better malleability, ductility, along with requisite strength. The right combination of strength and ductility ensure them to resist higher pressure without any breakages or leakages.
• Accurate Threading: HB brand pipe fittings are threaded on special purpose machines to ensure close tolerance limits of thread dimensions which lead to their close contacts with pipes, valves and cocks etc. and as such there remains no chance of leakage.
• Chamfering: HB brand pipe fittings are chamfered slightly on every thread opening to enable easy and correct entrance of pipes, valves & cocks etc. It also ensures an easy engagement of first thread.
• Hot Dip Galvanizing: Pure zinc is used employing hot dip technique for galvanising HB brand pipe fittings. Hot dip galvanising technique ensures zinc coating to be uniform, smooth, clean, free from black spots, acid spots and pimples. Hence the resultant thick & continuous coating of zinc gives them extra protection against environmental corrosion.