It has been debated over uphill l
It has been debated over uphill l
(OP)
It has been debated over uphill low hydrogen welding is preferable over downhill cellulose welding for plant applications. The fact is that it has been proven that over the last several decades through extensive mechanical testing and field application that the metallurgical differences between the two are negligible.
The concerns in the past have been Hydrogen embrittlement ,poor weld quality ,or cracking issues .The fact is that with the advancements in welding electrodes and Welding Procedures (WPS) show that heat input in the HAZ is reduced and causes less stress on the weldment and parent material .
To sum it up this has become a preferred method of welding in the midstream and processing side of the oil and gas industry due to its high quality welds, production, and flexibility in application in adverse wind conditions where low hydrogen electrodes fail due to porosity issues.
The main factors for weld failures are contributed to pour craftsmanship in assembly, inferior materials and unqualified welding operators. If the welding procedures are followed , proper materials selected and all NDE requirements fulfilled all welds should be equally reliable .
The concerns in the past have been Hydrogen embrittlement ,poor weld quality ,or cracking issues .The fact is that with the advancements in welding electrodes and Welding Procedures (WPS) show that heat input in the HAZ is reduced and causes less stress on the weldment and parent material .
To sum it up this has become a preferred method of welding in the midstream and processing side of the oil and gas industry due to its high quality welds, production, and flexibility in application in adverse wind conditions where low hydrogen electrodes fail due to porosity issues.
The main factors for weld failures are contributed to pour craftsmanship in assembly, inferior materials and unqualified welding operators. If the welding procedures are followed , proper materials selected and all NDE requirements fulfilled all welds should be equally reliable .





RE: It has been debated over uphill l
RE: It has been debated over uphill l
There are also legitimate reasons to use cellulosic electrodes to provide sound, serviceable welds in carbon and low alloy steels used in the pipeline industries.
RE: It has been debated over uphill l
RE: It has been debated over uphill l
As to the internal high low issues if you stay within B31.3 standards on mismatch no experienced welder will have any trouble making X-ray quality welds regardless of the welding process used.
RE: It has been debated over uphill l
Apparently, your Contractors and their welders are exemplary. Many are not, and the lowest bidder generally wins the job.
RE: It has been debated over uphill l
RE: It has been debated over uphill l
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"