China Nickel Alloy Pipe manufacturer


TOBO Alloy Group is a mature, steady and energetic high-tech company, specializing in manufacture of high-temperature alloys and corrosion resistant alloys, such as Hastelloy, Haynes, Monel, Inconel, Incoloy and nickel.


February 28, 2022

Class 150 90Degree Elbow Galvanized Malleable Iron Pipe Fittings

Class 150 90Degree Elbow Galvanized Malleable Iron Pipe Fittings


Quick Details

150# Black & Galvanized Malleable Iron Pipe Fittings


• Meets or exceeds all applicable ASTM and ANSI standards
• Stocked from 1/8" through 6" diameters
• 100% pressure tested before leaving the factory
• UL and FM approved




Manufacturing facilities are ISO 9001:2000 and ISO 14001 • Class 150 China fittings are UL listed and FM approved at 300 PSI • Class 300 China fittings are UL listed • Malleable castings conform to ASTM A197 • Hot-dipped galvanized fittings conform to ASTM A153 • Malleable fitting dimensions conform to ASME B16.3 • Malleable bushings, plugs and locknuts conform to ASME B16.14 • Malleable unions conform to ASME B16.39 • NPT threads on all fittings conform to ASME B1.20.1 • Independent lab verification that fittings meet applicable chemical & physical properties


What are malleable iron pipe fittings used for?


Malleable fittings are usually used to connect steel pipes. However, galvanized malleable fittings are used for galvanized pipe.

Malleable iron pipe fittings are most common among malleable fittings and are available in many different types and sizes.


What is the difference between malleable and cast iron fittings?


Malleable iron is relatively easy to machine, and it is shock resistant. Cast iron contains about two percent carbon,

which makes it stronger and more resistant to rusting. But this also makes it more difficult to machine because it is difficult to

get a smooth surface with the material.


90 ElbowClass 150 90Degree Elbow Galvanized Malleable Iron Pipe Fittings 0

Size 1/8 1/4 3/8 1/2 3/4 1
A 0.69 0.81 0.95 1.12 1.31 1.50
Size 1-1/4 1-1/2 2 2-1/2 3 4
A 1.75 1.94 2.25 2.70 3.08 3.79
Size 5 6
A 4.50 5.13

What is the standard for malleable iron fittings?


Class 150 Malleable Iron threaded fittings have no pressure class markings. All fittings shall be threaded with American

National Standard Pipe Threads (ANSI/ASME B1. 20.1) and shall have taper threads, except wrought couplings and wrought

caps in sizes 1/8, 1/4, 3/8 and 1/2, which may have straight threads.



Forged Iron Threaded or Socket Weld Fittings are more expensive in sizes bigger than 2 inch compared to their malleable iron

or butt weld counter parts.

Malleable Iron Fitting and Threaded Pipe Fitting differ in material metallurgy, pressure class and application .

It is important to select appropriately between them for the intended application.


Malleable iron fittings, also called black iron fittings, are available up to 6 inch nominal pipe size, though they are more common to 4 inches. Malleable fittings include elbows, tees, couplings and floor flange etc.


Contact Details