All are 1" diameter and 48" long and have to support 540lbs being hanged from the center of the pipe. But in the United States, there are about 24 people killed every year in fires caused by leaks or breaks in the natural gas or propane systems. Only time I see galvanized for gas is outside applications. You may be familiar with “galvanized pipe for gas”. Black Steel Pipe. The dark color comes from the iron-oxide formed on its surface during manufacturing. Black steel pipes are more likely to erode than galvanized pipes and for this reason, they tend to be used for transporting gas while galvanized pipes for carrying water. For decades, schedule 40 black iron pipe was the default choice for piping gas to furnaces and water heaters. The Black steel pipes are pretty common in transporting home natural gas to the houses. The primary purpose of black steel pipe is to carry propane or natural gas into residential homes and commercial buildings. What is stronger, Black iron pipe, Galvanized steel Pipe, or Rigid Conduit? NFPA 58 allows both black and galvanized pipe for propane gas however both types have to be certified ASTM A53 steel pipe so there wouldn't be any difference in the strength of the pipe. Also, black iron pipes are used to connect supply lines in the factories. Black steel pipe is different from galvanized pipe because it is uncoated. Re: Gas pipe, galvanized or black iron Holy christ..no street fittings or close nipples? While it does its job pretty well, over time, it still does corrode. Originally black iron and galvanized iron pipes were made differently, and the black iron was less likely to have microscopic leaks. In my experience, both types of piping work fine, and the IRC and the … Q. Limitations Of Black Iron Pipe. Is there a problem with galvanized pipe? Natural gas is among the least expensive and most efficient ways to fuel a furnace or boiler. theory 1 is the most common, but according to quite a few internet sources it is false. the only difference is in the Galvanized coating. In my area, only black iron pipe is allowed for gas lines. Black iron pipe is, simply put, the same thing, but without the zinc coating. Florida’s high humidity and frequent rain is not kind to unprotected metal pipe like black iron. And the corrosion protection offered by (expensive) galvanization was much less necessary with gas vs water pipes. Everything is pretty much fair game here, EXCEPT no teflon tape for any steel pipe carrying natural gas. I built a trebuchet and used black iron and it has already bent after just one launch. Black Pipe vs Galvanized Pipe. Incidents causing injury, death, or property damage over $50,000 happen about 286 times a year. The zinc coating on galvanized pipe for gas is meant to keep the pipe from corroding from contact with moisture. A.Mike Casey, a licensed plumber in Connecticut and California and co-author of Code Check Plumbing, responds: Although black iron pipe is a bit less expensive, galvanized pipe offers better corrosion resistance. 2. black pipe is cheaper 3. using different pipe for gas makes sure gas pipe won't be used for water lines. I have heard three different reasons why black pipe should be used instead of galvanized: 1. galvanized pipe produces flakes that jam gas orifices. Pipe downstream of meter is homeowner’s ... Steel, copper, brass: The most common gas piping is black steel. Galvanized has had the reputation for clogging orifices, though I personally have not encountered this in 36 years in construction. You will not be allowed to use unwrapped black pipe in most jurisdictions. They are not as durable as the galvanized pipe but worth the gas transport which the galvanized pipe … It's all black pipe on the inside around our area.