The length of a pipe measures the distance in meters, or feet, between the two ends of a tubular section. Generally, pipes below 2 inches in diameter are manufactured in single random lengths (“SRL”, 5 to 7 meters), larger pipes in double random lengths (“DRL”, 11 to 13 meters).
The most common terms used to designate the length of steel pipes are:
- SRL (single random pipe length): 5-7 meters in length – generally used for pipes below 2 inches
- DRL (double random pipe length): 11-13 meters per pipe, for pipes above 2 inches
- Cut Lengths: pipes are cut at specific lengths according to project specification. Cut lengths pipes are generally more expensive than standard but may save EPC and End-Users the costs related to welding activities.
PIPE LENGTH TOLERANCE
In the case of “cut lengths” pipes, the allowed tolerance is between within -0mm / +6mm.
PIPE END TYPES
The pipe end concept refers to the type of finish applied to the extremities of the tubular, and the consequent type of pipe to pipe connection that will be necessary to deploy a pipeline or a piping system.
The most common types of pipe end connections are:
- Plain ends (PE): ASME ANSI B16.5. PE ends are generally used for smaller diameters and imply the usage of slip-on flanges, and socket weld fittings.
- Beveled ends (BE): ASME ANSI B16.5. BE ends are the most common type of finish (joints are realized by welding pipes with butt weld fittings and flanges).
- Threaded ends (TE): ASME B1.20.1 NPT. TE ends require threaded fittings and flanges and are typical for small size pipelines.
- Threaded and coupled ends (T&C), generally used for gas distribution
- Grooved ends (example Victaulic pipes)