English to Spanish Tech/Engineering Nuclear Eng/Sci

En un texto sobre una tecnología para realizar reparaciones en las conducciones de las centrales nucleares aparece la palabra "coupon" en los siguientes contextos:

Tomari Arc Spray – Coupon preparation and delivery of information

Coupons for thickness measurement of coating film: 4 pieces.

Coupon description:
Base material: SB46 or similar material, having the same sonic velocity as SB46
Thickness: 16mm thickness (equivalent to cross-under pipe of Tomari)

Test coupon for demonstration: 1 piece.

The layer thickness of all coupons must be representatively measured using the measurement device of Metallisation Inc.

Provision of arc spray coupons as defined in the attached description


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Gracias a todos por adelantado

Pere