These welded steel, schedule 40 pipes feature NPT threads at both ends. Black steel pipe is interchangeable with black cast-iron or black malleable iron pipe . Galvanized pipe is zinc-coated to resist rust and corrosion. Use in low-pressure plumbing applications including air, water, oil, natural gas, and steam.
Is iron pipe thread the same as NPT?
A tapered thread standard that is used for connecting various sizes of rigid pipe. This standard may be referred to as tapered iron pipe thread (TIPT), National pipe thread (NPT), iron pipe thread (IPT), or iron pipe standard thread (IPS).
What type of steel is black iron pipe?
Despite its name, black iron pipe is actually made of a low-grade “mild steel” compound . This gives it much better corrosion resistance than traditional cast iron piping.
Can black iron pipe be threaded?
Black iron pipes are steel pipes that are cut to length, threaded , and used in applications such as gas lines and water supply lines. ... Teflon tape or pipe dope can be used to create a seal on black iron pipe.
What are black pipe fittings made of?
Black steel pipe can be welded using any welding method used for steel. This includes MIG, flux core, TIG, and stick arc welding. But black-pipe fittings are made of malleable black iron . Black-iron fittings are difficult to weld without causing damage to the fitting.
What does NPT mean in piping?
The best known and most widely used connection where the pipe thread provides both the mechanical joint and the hydraulic seal is the American National Pipe Tapered Thread , or NPT.
Is iron pipe NPT?
IPT (Iron Pipe Thread) is equivalent to NPT ; Some sources also refer to IPS (Iron Pipe Straight); using IPS risk confusion with NPS listed below.
Is black iron pipe stronger than galvanized pipe?
Black steel pipe is different from galvanized pipe because it is uncoated. ... The pipe is manufactured without a seam, making it a stronger and safer pipe to carry gas. The black steel pipe is also used for fire sprinkler systems because it is more fire-resistant than galvanized pipe.
What is the difference between black and black iron?
Black iron pipe is used to transport natural and propane gas in residential applications. ... Black steel pipe, on the other hand, is not suitable for water transport . Black steel pipes tend to corrode in water and mineral of the pipe will dissolve into the water and clog the line as well.
Is black pipe steel or iron?
Black steel pipes are made of steel that has not been coated with a substrate such as zinc or paint. Since it has a dark color surface that is forms by iron oxide during the manufacturing process, it is called black steel pipe.
What is black pipe called?
Black pipes are also called steel pipes and are used to carry water and gas from their sources to the end users. It is the pipe that is used by businesses and homes to convey their supply of natural or propane gas.
Are black pipes weldable?
Can You Weld Black Iron Pipe To Steel? Black iron pipe is simply mild low carbon steel so it can be welded to most grades of steel .
How tight should black iron pipe be?
Teflon paste and or tape greatly lubricates the joint and makes if very possible to over tighten the fitting. there should be about 3 threads showing when the joint is right. An old timer gas guy told me years ago the joint only needs to be tight enough to not leak.
Is black iron pipe toxic?
Welding black iron pipe has no additional risks other than what comes standard with welding since the pipe itself has not been treated with zinc. Welding any material comes with certain risks, but luckily black iron pipe is not one of the materials that increase potential toxic fumes .
Is black pipe weatherproof?
Black pipe is plain steel pipe without any protective coatings. ... Since black pipe has no protective coating , it may rust easily in wet or humid environments. To stop the pipe from rusting or corroding on the outside, you should provide a layer of protection on the outside of the pipe. The easiest method is painting it.
Can black steel be used for drinking water?
Black steel pipe is used to transport water and natural gas from their sources to homes and businesses. Black pipe is also used for fire sprinkler systems because of its strong resistance to heat. ... Black steel pipe is not suitable for carrying drinking water because it rusts easily .
