Features of black steel pipe
The black steel pipe gets its name for its dark surface. It is coated by the iron-oxide surface rather than the galvanized coatings. Since during the production process of black steel pipes, they are made by the seamless technology, they are endowed with better sealing condition. Thereby, the black steel pipes are favored by the gas suppliers. In addition, compared with the galvanized pipes, the black steel pipes are more fireproof and so they could be used to form the fire sprinkler system.

Features of galvanized pipe
The galvanized steel pipes are more resistant to corrosion due to the zinc coating. Generally, these pipes are used to transfer water for individual and commercial purpose. But with the past of the time, the zinc coatings would flake off, and so the ability to resist to corrosion would be decreased. In addition, the galvanized pipes should not be allowed to transfer the gas.

The difference of price between black steel pipes and galvanized pipes
Since the galvanized pipes need to be covered by the zinc coatings, they are much more expensive than the black steel pipes. No matter you are installing the pipe system in your house or in the business building, you should never let the two types of pipes to be joined with each other. They are designed for different construction purposes. While you are not knowledgeable of the information to form the pipe system, you should better consult with an engineer.

There are various kinds of steel pipes actually, and API steel pipe is one of the standard pipes that are produced in according to the requirements of Amercian Petroleum Institute. You are advised to choose the API steel pipe from a reliable supplier. Welding steel pipe is differently depending on the style and type of steel. Different steel pipe calls for different welding methods actually and they have different requirements on temperature, melt point and so forth. Certain steels require special preheating and cooling to avoid cracking during welding or cooling. Some people tend to weld steel pipe using a standard hand held propane torch, and some like to use TIG or MIG welding tools.

In order to weld API steel pipe, you need to prepare tools, like hand-held propane torch, proper welding rod or solder for style of steel, welding goggles. You are advised to choose the welded steel pipe from a reliable supplier. You should weld with steady uniform movements and attempt to keep weld even around entire joint. Well, welding without proper protective gear will cause serious injury actually. You are advised to weld carefully.

Wear your protective goggles and ensure that the welding goggles cover your eyes during the melting process. To protect your eyes from the bright light is really needed actually. The ends of API steel pipe need to be heated before welding. You should control the heat temperature actually. Use a hand-held propane torch to solder the welding rod into the joint of the steel pipe. You are advised to choose the black steel pipe from a reliable supplier. Or you can melt the welding rod into the joint of the steel pipe actually. The melted welding rod or solder joint should completely cover the pipe joint surface.
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