Material selection on gas lines is driven by pressure tier, whether the line is buried or above ground, and the station type. Transmission lines use API 5L pipe, while stations and pressure reduction units bring flanged joints, filter and regulator area items and isolation gasket sets to the fore. On buried lines, correct electrical separation is essential for cathodic protection to work.
A buried steel line is protected from corrosion by cathodic protection. To keep the protection from draining away, the line must be electrically separated at the station entry or between protection zones. That separation is achieved with an isolation gasket set at the flanged joint.
Working with distribution companies and their contractors we see two different needs: bulk project supply, and the small items site teams consume continuously. Lead time and certification drive the first, stock continuity the second. In both cases, once the item list, pressure tier and delivery location are shared we reply with price and lead time the same day.
Which pipe standard is used on gas lines?
API 5L is the common standard for transmission and distribution. Grades from Gr.B to X70 are selected by pressure tier, while station process piping may also use ASME B36.10M dimensions.
Why is an isolation gasket set needed?
It prevents the cathodic protection of a buried line from draining into the station or a neighbouring zone, allowing the protection to work effectively.
Do you supply small items continuously?
Yes. For flanges, gaskets and fasteners that site teams consume regularly we prepare a stock plan and framework pricing.
Share your item list, isometrics or MTO file for your natural gas requirement; we reply with price and lead time the same day.