Pipe fittings are essential components used to connect pipes, valves and other plumbing fixtures. Malleable iron pipe fittings are a type of fitting commonly used in water distribution systems, drainage applications and industrial piping.
Malleable iron pipe fittings are a durable and economical option for connecting pipes in a variety of applications. Their unique material properties allow them to be bent and formed into various shapes without cracking. Moreover, iron pipe fitting with zinc plating (sometimes we call it galvanised malleable iron pipe fittings) offer additional corrosion resistance for use with water, while black malleable iron is suitable for drainage. Hereby, let us understand more about these fittings by iron materials.
What Are Malleable Iron Pipe Fittings?
Malleable iron pipe fittings are made of iron that has been alloyed with small amounts of carbon and other elements like copper, nickel and chromium. This alloy has properties that make it both ductile (able to stretch without breaking) and malleable (able to be hammered or pressed into shape).
Malleable iron undergoes a heat treatment process where it is slowly cooled to form a fine grain structure. This gives the metal the ability to be bent and formed without becoming brittle and cracking.
Top 6 Types Of Malleable Iron Pipe Fittings
- Elbows – Used to change the direction of pipe runs. Available in degrees from 45 to 180.
- Tees – Branch outlets that allow pipes to join at right angles. Available in reducing and straight styles.
- Couplings – Connect two lengths of pipe together. Usually equipped with internal threads.
- Bushings – Connect pipes of two different sizes. Have tapered or straight inner walls.
- Caps – Close off open pipe ends. Usually screwed or flanged end caps.
- Unions – Allow pipes to be joined and disconnected easily. Also facilitate pipe alignment.
Malleable iron fittings are produced in various sizes to match standard iron pipe schedules, from 1/2 inch to 6 inches in diameter.
The three main types of malleable iron fittings are:
- Galvanized – Coated in a thin layer of zinc to prevent corrosion. Common for water distribution.
- Black – Uncoated, mill finish fittings. Often used for drainage and sewage systems.
- Threaded – Have tapered male or female threads to connect to pipes. Most common style.
Main 6 Features Of Malleable Iron Pipe Fittings
- Durable – Design allows fittings to withstand bending, vibration and torsion stresses.
- Corrosion Resistant – Either the black iron or galvanized versions resist corrosion from water and other liquids.
- Easy to Install – Threaded ends provide a simple and reliable connection method.
- Economical – Malleable iron fittings are usually cheaper than alternatives like brass or steel.
- Wide Size Range – Available in fittings sizes from 1/2 inch to 6 inches to match common pipes.
- Reusable – Can be unthreaded, bent back into shape and reinstalled multiple times.