PIPE LENGTHS AND PIPE ENDS


The terms SRL / DRL refer to the length of commercial pipes (respectively, single and double random lengths), the terms PE, BE, TE, T&C refer to the type of pipe ends finish (plain, threaded, beveled, threaded and coupled). In this article, we explain these abbreviations, which are frequently used in MTOs, RFQs, purchase orders and piping classes.


 

PIPE LENGTH (SINGLE AND DOUBLE RANDOM LENGTH)

Pipes length is generally connected to the diameter (i.e., the smaller the diameter, the shorter the pipe):

  • SRL (single random length): 5-7 meters length – generally used for pipes below 2 inches
  • DRL (double random 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 case of “cut lengths” pipes, the allowed tolerance is between within -0mm / +6mm.

pipe lengths

 


TYPES OF PIPE ENDS

Pipes and tubes are produced with different types of ends. The common pipe ends 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)
Pipe with plain end (PE) Pipe with beveled end (BE)Pipe with threaded end (TE)Pipe with grooved end (Victaulic type)
The image shows (left to right) plain, beveled, threaded and grooved ends for pipes.
 A video to explain how beveled pipes are joined together:

(Source: FTPipelineSystems)