Welding black pipe

[slickrock]

Quick welding question and I know not to weld galvinized pipe with regular arc rods. Is the black plumbing pipe (like what you would buy from Home Depot for plumbing in a house) galvinized? Or is it regular steel that I can weld on?

 

[dbarrett]

A quick test to see if it is mild rolled steel (and therefore weldable) is to drag a metal file acrossed it. If it makes a grove/cuts it, you should be able to weld it.

 

[D'Animal]

Your not building a rollcage are you?

 

[bsevans]

Quick welding question and I know not to weld galvinized pipe with regular arc rods. Is the black plumbing pipe (like what you would buy from Home Depot for plumbing in a house) galvinized? Or is it regular steel that I can weld on?

Black iron pipe which is generally used for gas supply lines in a home and not water supply, has no galvinized coating. It has been a while, but when I lived in CA it was against code to use galvinized pipe in a gas supply line. You can weld black iron (surface cleaned of course).

 

[Mace]

weld away..

 

[slickrock]

Your not building a rollcage are you?

no no no. I wanted to make a mounting point / tounge for my son's wagon to mount to his tricycle. It will probably roll, but figure 3 mps and fall 12"s. Very Xtreme.

Recap not galvanized and run a file over it and if it gooves, good to go.

Thanks for all the responses.

 

[Mace]

File will scratch cast too.. The filing will just be different

weld away..

 

[D'Animal]

Mace is a welder so he would know.

 

[Mace]

nope.. I am not a welder or a weldor..


Hydrologist here

 

[bkfj40]

nope.. I am not a welder or a weldor..


Hydrologist here

metal, water...

it's all the same

bk

 

[brian]

Quick welding question and I know not to weld galvinized pipe with regular arc rods.

why not?
galv pipe is just ''black'' pipe that has been galvinized. just try not to inhale too much of the fumes, limited exposure won't hurt you.
grind/sand the coating off where you wish to glue them togther and have at it.
when finished, spray some cold galvnizing ''paint'' on it.

 

[Toyo FJ40]

Black pipe sold at Home Depot is malleable steel. I don't think they sell cast but if it's under 2" inside diameter it's steel. and if it's threaded it's steel. Funny how codes differ, here in Pa you have to use galvanized pipe for gas outside from the meter to where it enters the house and you have to paint the threads.
And 2x on welding galvanized, it welds fine just watch the fumes.


Kevin

 

[brian]

Black pipe sold at Home Depot is malleable steel. I don't think they sell cast but if it's under 2" inside diameter it's steel. and if it's threaded it's steel. Funny how codes differ, here in Pa you have to use galvanized pipe for gas outside from the meter to where it enters the house and you have to paint the threads.
And 2x on welding galvanized, it welds fine just watch the fumes.


Kevin

not quite sure on the code part, but i have yet to see any galv gas lines.
i've ran a few lines as well as cut a few lines into exisiting lines.
granted i do not get into domestic stuff, purely industerial applications.

 

[Toyo FJ40]

not quite sure on the code part, but i have yet to see any galv gas lines.
i've ran a few lines as well as cut a few lines into exisiting lines.
granted i do not get into domestic stuff, purely industerial applications.

Well Peco requires any gas line that is exposed to weather to be galvanized to the inside of the building. I had a job shot down because the line running through the block wall from outside was black even though it was sleaved in a pvc pipe. I know a few old plumbers that always used gavanized fittings on a gas line so that Peco could tell that they didn't use cast fittings.

Kevin