I am seeking your expert advise on determining the governing thickness for both welding and PWHT when welding a sockolet on a blind flange per ASME B31.8.
I have consulted several welding engineers and got different replies. Also, I did not find this case in any of the standard interpretations...
We have ASTM A335 P11 pipes that were post weld heat treated per ASME B31.3. We took the hardness values before and after PWHT for some reason. The resulting hardness values are below.
I noticed that the average hardness value of the four readings in the weld zone is higher after the PWHT. My...
I work as a client rep. and in one of the clients specs there is a requirement for sizing the PRV used during hydro testing any piping system per API 520.
I did some research on sizing the PRV and found that the relief capacity depends on the flow rate. We mainly use water for pressure testing...
In the 2014 edition of B31.3, Para 331.1.7 was removed as well as the BHN values in Table 331.1.1. However, Para 331.1.7 is still referenced throughout the standard.
Does this mean that Hardness testing is no longer required after PWHT?
Mohammed Diab.
Inspection Supervisor - Saudi Aramco.
We are reviewing a WPS for a Split-tee hot-tap in accordance with API 1104 Annex B. In the WPS, the contractor is considering all the welds of the split-tee to be in service, including the longitudinal joint that has a backing strip, and they are considering the essential variables only in Annex...
For a 230 km 26" CS pipeline that has been hydrotested (by sections), we need to perform the final lay-up.
After the pipeline sections have been hydrotested separately with the valves being not installed; the golden joints for the valves and the hydrotest limits have been completed.
The drying...
We are Constructing a 230 km buried pipeline. The pipeline is completed and hydrotested.
During the perming, one of the loaders hit the pipe, leaving a severe damage in the pipe, as shown in the attached picture.
I recommended to remove a 2 meters length of the pipe, and weld a new pup piece...
Good day all,
We are hydrotesting a 16" CS buried pipeline with a crude oil service.
This will be done by 2 stages:
stage 1: 2 hrs strength test at nearly 1126 psi.
stage 2: 24 hrs tightness test at nearly 1070 psi.
At the end of stage 2, when we are reviewing the pressure and temperature...
