SANITARY VALVE

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Surface Finish: TABLE SF-5 ACCEPTANCE CRITERIA FOR INTERIOR SURFACE FINISHES OF VALVE BODIES
Anomaly or Indication

Acceptance Criteria

  
Cluster of pits No more than 4 pits per each 1/2 in. X 1/2 in. inspection window. The
  cumulative total of all relevant pits shall not exceed 0.040 in.
Demarcation If < 5% of the total area when visually inspected and Ra max. is met.
Dents None accepted.
Grit lines If Ra max. is met.
Nicks If depth < 0.010 in.
Pits If diameter < 0.020 in. and bottom is shiny. Pits < 0.003 in. diameter
  are irrelevant and acceptable.
Porosity If diameter < 0.010 in. and bottom is shiny.
Scratches If length < 0.25 in., depth < 0.003 in., and Ra max. is met.
Surface cracks None accepted.
Surface inclusions If Ra max. is met and there is no liquid penetrant indication.
Surface residuals None accepted, visual inspection.
Surface roughness (Ra) See Table SF-6.
Weld slag None accepted.
 

TABLE SF-6 Ra READINGS FOR VALVES
Sanitary VALVE - Haitima Valve GENERAL NOTES:

(a) ALL Ra readings are taken across the lay,

wherever possible.

(b) No single Ra reading shall exceed the Ra

Ra max. value in this table.

(c) Other Ra readings are available if agreed

upon between owner/user and manufacturer,

not to exceed values in this table.

NOTE:

(1) Or any other finishing method that meets

the Ra max.
Sanitary VALVE - Haitima Valve

Grit: Measures the number of scratches per linear inch of

abrasive pad. Higher numbers indicate a smoother

finish.

RMS: Defined as Root Mean Square roughness, this method

measures a sample for peaks and valleys. Lower

numbers indicate a smoother finish.

Ra: Known as the Arithmetic Mean, this measurement

represents the average value of all peaks and valleys.

Lower numbers indicate a smooth finish.

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