Qatar Gas Approved Flanges

When we talk about flanges supplied for Qatar Gas–related projects, the first thing I usually explain is that LNG work is very different from general piping supply. At Mcneil Alloys, we handle enquiries for gas and LNG facilities that follow the technical requirements used by QatarGas, and those requirements tend to be detailed and non-negotiable.

From our side in the UAE, we manufacture, supply, and export flanges that are intended for use in gas processing units, LNG trains, utility systems, and supporting infrastructure. These environments run continuously, and once the system is live, access is limited. Because of that, flanges are expected to be right the first time, both in terms of material and fit-up.

When an enquiry comes in, we don’t look at it as just a size and pressure class. The first thing I want to understand is where the flange will actually be installed. A flange in a liquefaction unit behaves very differently from one used in a utility line or transfer system. That one detail usually decides the material grade, testing scope, and inspection level.

What Usually Makes the Difference on Qatar Gas Projects

From experience, the difference between a smooth inspection and a delayed one often comes down to small details that are easy to overlook at the enquiry stage. On Qatar Gas–related work, flanges are rarely rejected because of size alone. Issues tend to come from mismatched documentation, unclear material condition, or assumptions made too early in the process.

Taking time to confirm service conditions, inspection scope, and documentation expectations before manufacturing starts helps avoid these problems. It also allows the flange to move through inspection and installation without unnecessary questions or hold points later on.

Points We Always Double-Check Before Supplying

• The exact service the flange will be used for, not just the line number

• Operating pressure and temperature, especially for LNG and gas service

• Material grade and condition, including any specific heat treatment

• Facing type and surface finish expected by the inspector

• Testing and inspection scope required for that particular package

• Documentation format and traceability expectations

Ready to Move Forward?

If you’re working on a Qatar Gas project, a quick discussion before finalising the order can save time later. Share your drawings or specs, and we’ll review them practically and advise what’s needed. Contact Mcneil Alloys to move forward with confidence.