Thursday, December 11, 2014

An introduction to Pipe & Tube Classification

Pipe classification:

Iron pipe size (approximate internal dia.)

Manufacturers’ weight: NPS +

  • STD
  • XS
  • XXS

Schedule number: NPS +

  • 5, 5s, 10, 10s, 20, 20s, 30, 40, 40s, 60, 80, 80s, 100, 120, 140, 160
  • SCH ≈ 1000 P/S
  • NPS ≤ 12, OD ≥ NPS
  • NPS ≥ 14, OD = NPS
  • NPS ≤ 10, SCH 40 = STD
  • NPS ≤ 8, SCH 80 = XS
  • Light wall = light gage = 5, 5s, 10, 10s

API designation

  • A25, A, B, X42, X46, X52, X60, X65, X70
  • X(AA), AA = Allowable stress

Pressure-Temperature Ratings

  • 150, 300, 400, 600, 900, 1500, 2500

Pipe:

  • NPS:

1/8”, ¼”, 3/8”, ½”, ¾”, 1”, 1 ½”, 2”, 3”, 4”, 6”, 8”, 10”,
12”, 14”, 16”, 18”, 20”, 24”, 28”, 30”, 32”, 36”, 40”,
44”, 48” 52”, 56”, 60”
  • NPS
1 ¼”, 2 ½”, 3 ½”, 5” not used

Pipe is supplied in 

  • Random length (17 to 25 ft)
  • Double random length (38 to 48 ft)

Pipe end:

  • BE (bevel end)
  • PE (plain end)
  • T& C (treaded and coupled, rating of coupling shall be specified

Tube:

Specify by two of

  • Outside diameter
  • Inside diameter
  1. Thousandths of inch
  2. Gauge number
  • American wire gauge
  • Steel wire gauge
  • Birmingham wire gauge
When gauge numbers are given without reference to a system (BWG) is implied.

Get Notified for new Tutorials:
*Check your email to confirm your subscription*


0 comments :

Post a Comment

 

© 2011 PIPING GUIDE - Designed by Ankit | ToS | Privacy Policy | Sitemap

About Us | Contact Us | Write For Us