Company Hydro-Exemption

Question 1

What testing does company require on shell-to-bottom welds for hydro-exemption?

Answer 1

1. Visual root pass
2. MT/PT root pass
3. Pen Oil test root pass
4. Visual Final pass
5. MT/PT Final Pass
6. Pen oil or vacuum box final pass

Question 2

What testing does company require on bottom welds within critical zone for hydro-exemption?

Answer 2

1. visual root pass
2. mt/pt root pass
3. visual final pass
4. mt/pt final pass
5. Ut final pass (regarding annular butt joints)
6. vacuum box final pass

Question 3

What testing does company require on bottom welds outside the critical zone for hydro-exemption?

Answer 3

1. mt/pt final pass
2. vacuum box or tracer gas after final pass

Question 4

What testing does company require on shell plate to shell plate welds (less than 1” thick) for hydro-exemption?

Answer 4

1. visual final
2. 100% RT of vertical and horizontal welds

Question 5

What testing does company require on shell welds for reinforcing plate-to-nozzle neck and nozzle neck-to-shell joints (API 653 12.3.3.3.6) for hydro-exemption?

Answer 5

1. complete penetration and fusion
2. mt/pt back-gouged surface of root pass
3. visual final pass
4. mt/pt final pass
5. ut shearwave final pass

Question 6

What testing does company require on brittle facture requirements for hydro-exemption?

Answer 6

1. new and old material shall meet DMT requirements or be exempt per API 653 section 5.