Safe Use of Galvanized Fittings in Gas Piping Systems

by | May 27, 2024 | Industry Knowledge

When designing and installing gas distribution systems, the choice of materials can significantly impact the safety and functionality of the setup. Two common materials used in gas pipelines are galvanized fittings and black iron fittings. Let’s break down how each of these can be used, their differences, and how to ensure safe usage, especially in regard to galvanized fittings.

Galvanized Pipe Fittings

Galvanized fittings are not typically recommended for gas lines due to the potential risks involved.

The principal concern lies in the zinc coating that characterizes galvanized fittings; this coating can react chemically with natural gas and its constituents, potentially leading to the production of flaky residue. Over time, these flakes can accumulate and obstruct the flow within the pipes, leading to reduced efficiency or even dangerous blockages that could cause pressure buildup.the transport of gas with galvanized pipe fitting is dangerous, so it is mainly used for transporting water outdoors and in industry.

The process of galvanizing has improved a lot now, and the zinc coating will not peel off. As the largest manufacturer of malleable steel pipe fittings in China, Jianzhi fittings have three surface treatment methods of hot-dip galvanized, cold-galvanized and black parts for customers to choose from according to different needs. However, we recommend that if you need to use galvanized pipe fittings, you must refer to local laws and regulations.

Another reason why we don’t recommend you to use galvanized pipe fittings is because galvanized pipe fittings increase the galvanizing process, so it is more expensive than black iron pipe fittings. This is also one of the reasons why more black iron pipe fittings are used in gas transmission.

black iron pipes

In many cases, building codes do not recommend or allow the mixing of galvanized and black iron fittings in gas piping systems.When two pipe fittings of different metallic properties come into contact, a battery effect may occur, leading to accelerated corrosion.

If you’re looking to gain deeper insights into high-quality galvanized pipe fittings and their various applications, our team is here to provide you with all the necessary information. Don’t hesitate to get in touch with us for more information.