If you consider 2023 edition of Sec VIII-1 or VIII-2, Code has changed for P1 Gr 1 and 2 materials. Heat treatment condition is no longer a variable enforced by construction Code. If the material is other than P1 Gr 1 or 2 or if you are mandated to use edition prior to 2023, NACT should be...
Refer UW-51(a)(4) of Code Section VIII-1-2015
As an alternative to the radiographic examination all welds in material 1/4 in. (6 mm)and greater in thickness may be examined using the ultrasonic(UT) method per the requirements of 7.5.5 of Section VIII, Division 2. Which is automatic or semi...
ElCid,
One way to do is to reverse calculate the stresses (S) in pressure parts with pressure P = 10bar and thickness of the pressure part in new condition and ensure that the stresses are less than yield strength of material at room temperature.
You also need to talk to your AI about this...
Section VIII-1 is not restricted or prohibited for use at this pressure temperature condition. Depending on size (dia and length), VIII-2 may be economical. As XL83NL advised ensure you are complying with jurisdiction. Better talk to your AI
Dear ElCid
UG-99(c) hydrotest pressure is the calculated test pressure in new and cold condition of the vessel. It is derived based on the actual thickness used and in new condition (un-corroded) . Maximum allowable pressure (MAP) is reverse calculated for all pressure parts. This pressure is...
DEAR PVTC
You need to satisfy all the conditions UHA-51(f)(1) thru UHA-51(f)(4).
Since you are using GTAW, UHA-51(f)(1) is satisfied
You need to have PQR done with impact tests to satisfy UHA-51(f)(2)
Since you are using ER308L, UHA-51(f)(3) is satisfied
For GTAW, applicable paragraph is...
Dear DSB123
You need to consider all design loading conditions (pressure including internal and external, temperature and other loads) for minimum thickness determination. 1.5+CA is Code permitted minimum thickness provided other design rules are met
Stan3126
Both base metal P no and Filler Metal F no are essential variables for welder.
GTAW F no being 6 for both carbon steel and duplex consumables, you may use welder qualified on P1 to weld P10H
For SMAW F no is not same for carbon steel (F no. 4) and Duplex (F no. 5). In this case you may...
Dear Stan3126
Both base metal thickness and deposited weld metal thickness are two different essential variables. PQR made on 3/8" thick is qualifying minimum 1/16" and maximum 3/4" base metal and a maximum of 3/4" weld metal thickness. You can't use any of your PQRs to weld a 1" thick base metal.
For crude oil service you need to meet UG-16(b)that is minimum thickness to be 1.5mm + Corrosion allowance. In addition you need to perform UG-27 calculations based on design pressure and temperature
ASME mandates use of governing Code edition that depends on the contract date. One must use edition of Code that is mandatory on the date you signed contract. Code editions become mandatory 6 months after the issue. That means 2017 edition was issued on July 01, 2017 and has become mandatory...
