sa 516 gr 70 material

Wow. 5 undefined abbreviations. Is that a record?

Hello guest,

Your post is just similar to that some one saying " I want it . Give it to me."

I think you should start with very basic questions like what is WPS

You need to provide lots of information to write your WPS for SA 516 Gr 70, such as your thickness range, the process of welding and etc.

I think you need review following point which extracted from ASME IX, then you can easily can write your WPS and PQR

1. A WPS is a written document that provides direction to the welder or welding operator for making production weld in accordance code requirement

2. The PQR documents what occurred during welding the test coupon and the result of testing of the coupon.

3. Procedure qualifications give suitability of weld for required mechanical properties (i.e., strength, ductility), while performance qualifications show ability of the welder to deposit sound weld.

4. WPS and PQR made in accordance with requirement of sec IX prior to 1962 in which all requirement of 1962 edition are met may also be used

5. Each manufacture or contractor shall maintain a record of the result obtained in welding procedure and welder/operator performance qualifications. The records shall be certified by manufacture or contractor and accessible to the authorized inspector

6. Tension test gives tensile value, while bend test shows ductility and soundness. Radiography also indicates soundness.

Thus, Procedure Qualification: Tension test + Bend test

Performance Qualification: Bend test or Radiography

7. Tensile test for procedure qualification is passed if failure is in:

a) Weld metal at strength>= Base metal SMTS or

b) Base metal at strength>= 95% of base metal SMTS.

8. When the welder or welding operator is qualified by radiography, the minimum length of coupon to be examined shall be 6 inch and shall include the entire weld circumference for pipe

9. Production test with some condition is acceptable

10. Bend test crack shall not exceed 1/8" in any direction. Radiography criteria are stricter than radiography for job.

11. P-numbers represent parent metal classification of similar composition and properties, i.e., similar strength and ductility.

F-numbers give similar usability aspects of filler material.

A-numbers give similar chem. comp. In"as welded" condition.

12. Essential variables (EV), if changed require new procedure qualification. Non-essential variables (NEV) may be changed without new procedure qualification. But the procedure must be revised.

13. Supplementary essential variables (SEV) are considered as (EV) only if there is impact strength requirement. Otherwise they are "non-essential" variables.

14. EV and SEV are included in PQR document. EV, SEV and NEV are included in WPS document.

15. PQR document gives data used in PQR test and test results, and cannot be revised.

16. WPS gives parameters to be used in production job, and must be within ranges qualified by the PQR test.

17. WPS may be revised within the EVs qualified. The NEVs can always be revised without affecting validity of PQR.

18. Only in SMAW, SAW, GTAW, PAW and GMAW (except short-circuiting) or combination of them Radiography test can be used for welder performance qualification test, but there is exception, except P-No.21 through P-No.25 and P-No.51 through P-No.53 and P-No.61 through P-No.62, welder making groove welds P-No.21 through P-No.25 and P-No.51 through P-No.53 metals with GTAW process may also be qualified by radiography.

19. For welder performance qualification when coupon has failed the visual examination and immediate retest is intended to be done, the welder shall make two test coupon for each position which he has failed, if both test coupons passed the visual inspection one may be selected by examiner for mechanical, in a similar way if mechanical test coupon has failed, two test coupons shall make by welder, both test coupon shall pass the test.

20. For welder performance qualification by radiography for immediate retest, two 6 inch plate and for pipe examination shall include two pipes for a total of 12 inch of weld which shall include entire weld circumference

21. When the welder has not welded with a process during a period of 6 months or more, his qualification for that process shall expire

22. Article IV should not be read directly, during the study of other articles specifically "welding variables procedures specifications" (QW-252 through 265 ) should refer to specific paragraph in this article, in similar way for welder performance qualification in QW-352 through 356 should only to refer to addressed paragraph

23. For performance, 1G is flat, 2G is horizontal, 3G is vertical and 4G is overhead position. Pipe 5G qualifies 1G, 3G and 4G, but pipe 6G qualifies all positions.

For more detail you may review following article,

Pressure Vessel Inspection

regards