Impact Test

No.

Yan....

Perhaps you are talking about Charpy V notch testing ?

There is much background information on the internet regarding Charpy testing

Impact testing specimen size is dictated by the specific ASTM test procedure for the material.

MJCronin

yes, this for charpy V testing..

Are you speaking of DWTT?

We know that one dimension will be 12".

Get your copy of the piping spec and read it.

All your questions indicate that you know nothing about what you are doing. Can you prove otherwise?

IIRC, the standard test coupon is 10mm x 10mm x 50mm, with a notch machined to specific shape and dimensions. If the part to be tested is not large enough to accommodate the standard coupon, smaller sizes are possible, with corrected acceptance criteria.

12" Sch 80 is thicker than 10mm, so full-size coupons can be used.

For pipe you can use standards sizes, but for fittings you me be have to use reduce sizes (Anonymus poster give you the sizes. You can find the location for the samples, pipe, in API 5L. For fittings is more difficult, ANSI or MSSP Standards.

According to ASTM A370, the standard specimen size for Charpy impact testing is 10 mm × 10mm × 55mm. Subsize specimen sizes are: 10 mm × 7.5 mm × 55mm, 10 mm × 6.7 mm × 55 mm, 10 mm × 5 mm × 55 mm, 10 mm × 3.3 mm × 55 mm, 10 mm × 2.5 mm × 55 mm. Details of specimens as per ASTM A370 (Standard Test Method and Definitions for Mechanical Testing of Steel Products).

According to EN 10045-1,^[ standard specimen sizes are 10 mm × 10 mm × 55 mm. Subsize specimens are: 10 mm × 7.5 mm × 55 mm and 10 mm × 5 mm × 55 mm.

According to ISO 148 standard specimen sizes are 10 mm × 10 mm × 55 mm. Subsize specimens are: 10 mm × 7.5 mm × 55 mm, 10 mm × 5 mm × 55 mm and 10 mm × 2.5 mm × 55mm.

Good Luck WP