Forgings and wrought products may be tested in the longitudinal direction instead of the transverse direction, in which case they shall exhibit 27 J (20 ft-lb) minimum average value. For equipment rated for 20,000 psi and higher pressure , the Charpy V impact values shall –notch be in accordance with the class T-HP or table 23 or 68J (50ft-lb) minimum average in the longitudinal direction Table 5 Acceptance criteria for Charpy V-notch impact tests — Minimum impact value Minimum impact value required for average of Test temperature permitted for one specimen each set of three rating only per set specimens °C (°F) J (ft-lb) J (ft-lb) T-0, 18 0 20 15 14 10 T-20 T350 29 20 20 15 14 10 T-75 59 75 20 15 14 10 T-HP -29 -20 41 30 33 24 Rated pressure can be de-rated for elevated temperature service over 250 degrees F per annex G of API-6A. Qualification test coupons (QTC) General In remanufacturing the QTC used for reestablishing the material properties is removed from the part requiring weld repair. A QTC may be from an equal size part from the same heat number as the part requiring weld repair to represent the impact and/or tensile properties, provided it satisfies the requirements of this standard. The properties exhibited by the QTC shall represent the properties of the material comprising the equipment it qualifies. When the QTC is a trepanned core or a prolongation removed from a production part, the QTC only qualify parts having the same or smaller equivalent round (ER). A QTC may only qualify material and parts produced from the same heat. Equivalent round (ER) General The dimensions of a QTC for a part shall be determined using the following ER method. ER methods Annex-I illustrates the basic models for determining the ER of simple solid and hollowed parts and more complicated equipment. The ER of a part shall be determined using the actual dimensions of the part in the condition. “as-heat-treated”
Forgings and wrought products may be tested in the longitudinal direction instead of the transverse direction, in which case they shall exhibit 27 J (20 ft-lb) minimum average value. For equipment rated for 20,000 psi and higher pressure , the Charpy V –notch impact values shall be in accordance with the class T-HP or table 23 or 68J (50ft-lb) minimum average in the longitudinal direction Table 5 — Acceptance criteria for Charpy V-notch impact tests rating Test temperature Minimum impact value required for average of each set of three specimens Minimum impact value permitted for one specimen only per set °C (°F) J (ft-lb) J (ft-lb) T-0, 18 0 20 15 14 10 T-20 T350 29 20 20 15 14 10 T-75 59 75 20 15 14 10 T-HP -29 -20 41 30 33 24 Rated pressure can be de-rated for elevated temperature service over 250 degrees F per annex G of API-6A. Qualification test coupons (QTC) General In remanufacturing the QTC used for reestablishing the material properties is removed from the part requiring weld repair. A QTC may be from an equal size part from the same heat number as the part requiring weld repair to represent the impact and/or tensile properties, provided it satisfies the requirements of this standard. The properties exhibited by the QTC shall represent the properties of the material comprising the equipment it qualifies. When the QTC is a trepanned core or a prolongation removed from a production part, the QTC only qualify parts having the same or smaller equivalent round (ER). A QTC may only qualify material and parts produced from the same heat. Equivalent round (ER) General The dimensions of a QTC for a part shall be determined using the following ER method. ER methods Annex-I illustrates the basic models for determining the ER of simple solid and hollowed parts and more complicated equipment. The ER of a part shall be determined using the actual dimensions of the part in the “as-heat-treated” condition.
API-16AR%20Drill%20Through%20Equipment%20Repair%20and%20Remanufacturing%20Draft%2006-Jun-2014.docx