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, 201114 of 15

Tolerances for Pipe Fabrication

Tolerances for Pipe Fabrication

A - Variations in the indicated dimensions for Center to Face. Location of attachments etc, shall not exceed 3 mm. (Tolerance shall be cumulative)

B - For Piping Bends having a radius equal to SIX times the diameter or larger variations in the finished pipe caused by bending including any folds and bulges shall not exceed ± 3% x Nominal Ø of the Pipe.

C - Lateral translation of flanges in any direction from the indicated position shall not exceed 1.5 mm.

D - Rotation of flanges from the indicated position as shown shall not exceed 1.5 mm.

E - Aligment of flanges shall not deviate from the indicated position measured across any diameter more than 0.75 mm.


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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