Fixed Length Piping In Material Lists

Fixed length piping is treated in material lists as follows:

• No Fabrication Materials list will be plotted because all pipework assembly will be done on site. All materials will be listed under the Erection Materials heading.

• Where a spool includes a flange which has a different pressure rating or class from the normal one for that pipeline, a letter S will be added to the end of the spool’s item code.

• If this occurs more than once on a single spool, a digit will be added to indicate the number of occurrences. Thus a spool which includes n special flanges will have Sn appended to its item code.

• If the line type identifier in the specification is FP, the overall length of the straight will be appended to the item code before any special flange is denoted. The units of length will be mm or sixteenths of an inch. For example:

  PFK-ST2500  or  PFK-ST2500S1

• Note that the length of the straight is not appended for symbol key FPPL, which is intended for standard length barrel nipples.

• If the line type identifier in the specification is FX, the length should already have been built into the code by the user and will not, therefore, be appended in this way.

• Spool numbers will not be listed for FP or FX piping, even when spool numbering has been specified, because fixed length pipes are classified as components not pipe spools. Fixed length straights will, however, have material list numbers.

• Multiple use of any fixed-length fitting will result in a single entry in the material list, with the quantity specified, in the normal way. Straights having identical lengths and bores are treated as identical fittings in this way.