Ray-Check API-1104 Comparator Shims

Ray-Check API-1104 Comparator Shims


Meets API 1104, 13th Edition Requirements

Some codes require that shims be placed under the I.Q.I. to compensate for the thickness of a backing ring or weld reinforcement. Shims are supplied in the same materials as I.Q.I.’s. They are usually available in increments of 1/16", from 1/16" thick thru 1.0". The general dimension (3/4" x 2") allows approximately 1/8" clearance on each side of the I.Q.I. they are to be used with. Material and thickness is marked on each shim.

Note: Shims (3/4" x 2") are not to be used for applications requiring conformance to ASTM-E-1742


Technical Specifications

Comparator Shims can be used in conjunction with or in lieu of Penetrameter shims, as required by Par.8.4. Other configurations and dimensions may be used, provided notches are "V" shaped and 45 degrees. Included angles and depth tolerances are +/- 0.001".

Notch locations +/- 1/64". Dimensions exceed Penetrameter size by at least 1/8" on three sides.

3/4" x 13/x 3/32" with 0.008" notch on 1/4" center, 0.016" notch on 3/4" center and 0.32" notch on 11/8" center.


  • Top and bottom surfaces of shims to be parallel within +/- .001"
  • The bottom surface of the slots must be parallel to the bottom surface of the shim within +/- .001"
  • All fractional dimensions to be within +/- 1/64"


Note: Serialized radiographic products are not returnable

Description Part # Saved Price Select Option Add to
API-1104 Comparator Shim - Stainless Steel RT-RC-CS-API-1104-SS $115.00
API 1104 Comparator Shim - Steel RT-RC-CS-API-1104-ST $101.00
API-1104 Comparator Shims - Titanium RT-RC-CS-API-1104-TI $122.00