Can carbon steel pipes and galvanized pipes be welded together directly?

It can be connected using carbon steel flanges + threaded flanges. Galvanized steel pipes generally do not require welding

It can be welded, but it poses a challenge to the welder’s skills.

Under normal circumstances, carbon steel pipes and galvanized pipes are not connected to each other; if connection is required, valves should be used.

Sure. The operating conditions and voltage rating are the same as those of galvanized pipes.

It is possible, but the usage conditions and pressure resistance levels are the same as those of galvanized pipes, as mentioned above

They can be welded together. However, three factors must be considered: 1. Whether the wall thicknesses of the two pipes and the misalignment between them meet the welding requirements. 2. Proper preparation of the groove: It should be ground to the required slope, and the galvanizing and rust within 5 mm of the welding edge must be removed. 3. Do both types of pipes meet the requirements for the medium being used?

They can be welded together, but are only used for auxiliary pipelines such as cooling water pipes and compressed air pipes

I believe that unless there are special requirements, they are generally not welded together; flanges are used at the junctions of the materials to facilitate connection

It seems that using flanges for connection is better; welding galvanized materials is not very effective.

Carbon steel pipes can be welded to galvanized pipes

Carbon steel pipes can be welded to galvanized pipes, and are generally used for auxiliary pipelines such as cooling water pipes and compressed air pipes.

When direct welding is required under special operating conditions, appropriate treatment processes can be employed to enable welding. But try to avoid it. Flange connection is preferred.

Galvanizing, as the name suggests, means coating the surface with a layer of zinc; as long as bevels are created, there’s no problem

I agree with the opinion from the second floor: steel pipes and galvanized pipes should be connected using bolts or flanges. Welding galvanized pipes will damage their galvanizing layer, thereby affecting their corrosion resistance.

Will the surface of galvanized pipes oxidize severely after welding, to the point of being annealed? Will this have a significant impact on the quality? Is threading better, or has no one seen such joints used?

Galvanized pipes are generally used in applications at normal temperature and pressure for less critical pipelines, where high welding requirements are not necessary. Our factory has tested it in actual operations; it can be welded directly, either by butt welding or direct insertion. As for whether there are any standard requirements, I’m not quite sure.

It can be welded, but it poses a challenge to the welder’s skills; the quality of welding isn’t very good, so it’s done as a last resort

Galvanized pipes can be welded. Including seamless steel pipes + hot-dip galvanizing to produce galvanized seamless steel pipes, as well as ordinary galvanized welded steel pipes ； According to national standards and domestic supervision specifications, welding of galvanized steel pipes is generally not allowed. However, in many manufacturers in the IT industry, seamless steel pipes that have been galvanized are used for the cooling and chilled water pipelines in their air conditioning systems, and welding is the method employed for installation. Welding such galvanized steel pipes tends to result in porosity, and when preparing the groove, it is necessary to remove the galvanizing layer from the inner and outer walls of the pipe near the weld area; otherwise, welding will be difficult. Additionally, the welding process generates a lot of fumes with a strong odor. It is recommended that the operator wear a mask.

It can be welded. 1. Galvanized pipes involve coating the surface of welded pipes with zinc, primarily to provide corrosion protection; they are generally used in low-pressure pipelines such as water supply systems. 2. Carbon steel pipes are divided into welded and seamless types; the seamless type is mainly used in pipelines where pressure is a requirement, such as for compressed air and steam. Seamed types are mainly used in low-pressure pipelines and in systems where high requirements are not necessary. Therefore, when in use, two materials with the same operating conditions and voltage rating must be selected.

They can be welded together, but galvanized pipes do not have a high pressure resistance and are not suitable for use in pressurized pipelines. It’s best to sew them together! ! !