We're working in a dock, so any passivation will be require specific waste disposal. It's not impossible, but if we don't strictly need to, I'd like to avoid it. We have the chemicals here as we did some stainless steel welding where pickling was definitely needed.
If there isn't risk that...
I have received a number of parts that I need to stamp heat numbers to for traceability. The stamps are made of an unknown material, but do not seem to be corroded in any way, so perhaps they're stainless too, but I doubt it.
Should I passivate the stamped area of the parts after I have hand...
Original material of the sacrificial part is S355JR, provided in the normalized condition. I would like to replace it with a fully annealed AISI 4130. The mating component is an API 5L X80 Pipe. Corrosion risk is not a major factor in this case.
Good day all,
Without going into too much detail, I have a piston which reciprocates inside a hardened sleeve, lubricated by an oil/water mixture. The piston is a sacrificial part in the larger system and is manufactured with wear rings machined into the outer diameter. Once the rings are no...
There is no specific code of construction - the equipment being tested is oilfield equipment manufactured under API 6A, but the testing equipment does not fall under anything - ie: my company and client have not instructed me to follow a specific code.
The expected stress is around 1/2 of...
I am manufacturing a set of pressure testing caps (blanks) which are threaded onto a length of pipe 3"IDX6"OD Pipe which is then hydro-tested to 22 500 psi. These parts are manufactured from AQ&T AISI 4130. During manufacture, volumetric and surface NDE are conducted after heat treatment and...
Good day all,
I am looking at an ASTM A519 4130 heat for welding (the only material we can find which is close to size). The heat has a far higher Niobium content than our spec - 0.029 (heat analysis) vs 0.010 (spec).
Fortunately the Carbon Equivalent (IIW) is within spec - 0.72 (analysis) vs...
This is in fact not shaft, it is a pressure vessel that is intended for to be a spool piece in a pipeline. A major concern for me with hardness (ie Yield) is that Post-Weld Heat Treatment will be performed, resulting in a loss of hardness.
In terms of design and strength, this is close to the...
I am having parts manufactured from AISI 4130 (80KSI Yield). The parts are 9.00" OD x 4.50" ID X 20.00" LNG (approximately, with some internal details, threads etc). The shop making these didn't quote for heat treating after roughout, which I have now requested. I am having a bit of friction...
Good day all,
When corrosion allowances are specified (ie: maximum 2mm on the ID etc), is this allowance taking into account degradation of the material due to this corrosion in the form of micro structural effects (embrittlement etc).
In other words:
A pipe of 10" x 1.0" WT corrodes to...
