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ES - Piping Material Specification

  1. Table of contents
  2. Scope, codes, standards and references
  3. General and specific requirements
  4. Abbreviations for piping specifications
  5. Valve tag numbering
  6. Standard installation detail - Utility Station
  7. Special fabricated larger diameter reducers
  8. Four weld 90° LR Miter elbow
  9. Two weld 45° LR Miter elbow
  10. Perforated temporary conical strainers
  11. T-Type strainers
  12. Drip ring
  13. Product sampler cooler
  14. Tolerances for pipe fabrication
  15. Line Blinds NPS 1/2 - NPS 60
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Standard No.... Doc. No....
Piping Material Specification
Issue Date: Dec, 20115 of 15
Valve Tag Numbering
Material Class Valve Type Valve Ends
A - Ductile 0 - Class 1500 0 - Gate 0 - Threaded
B - Hastelloy B 1 - Class 150 1 - Globe 1 - Socket Weld
C - Carbon Steel 2 - Class 2500 2 - Swing Check 2 - Flanged, Raised Face
D - Chrome Moly 3 - Class 300 3 - Wafer Check 3 - Flanged, Flat Face
E - 316 Stainless Steel 4 - Class 4000 4 - Plug 4 - Flanged, Ring Type Joint
F - 316L Stainless Steel 5 - Class 3000 5 - Ball 5 - Buttweld, Bore to Match Pipe
G - Cast Iron 6 - Class 600 6 - Butterfly 6 - Threaded x Socket Weld
H - 304 Stainless Steel 7 - Class 6000 7 - Lift Check (Ball or Piston) 7 - Integral Male Socket Weld x Female Threaded
I - 304L Stainless Steel 8 - API Class 800 8 - Knife Gate 8 - Hub Connector - Grayloc
J - PVC 9 - Class 900 9 - Diaphragm 9 - Buttweld x Hub end
K - PTFE Lined      
L - Monel      
M - Hastelloy C      
N - 321 Stainless Steel      
O - Alloy 20      
P - FRP      

Tag Number shall be: V-Material Code / Pressure Class / Type / Ends / Two Digit Sequence

Example: V-C80100

  • (V) Valve
  • (C) Carbon Steel
  • (8) Class 800
  • (0) Gate Valve
  • (1) Socket Weld
  • (00) and the first of this type in sequence.

All Valve sequence numbers shall start at 00 and number ascending through 99.

Pipe Fabrication Institute

The primary purpose of the Pipe Fabrication Institute is to promote the highest standards of excellence in the pipe fabrication industry.

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