Hello,
STOPAQ PVC outerwrap is being considered for aeging underground CS piping which is protected by an impressed current CP system. The current drain test was performed on the piping and the required current for protection has been determined. Will the PVC wrap result in CP current...
Hello,
Stopaq PVC outerwrap has been considered for underground CS piping which is to be cathodically protected. Will the PVC wrapping result in CP current shielding?
Thanks,
Hello all,
A requirement has been raised in the operating company I work at for impressed current cathodic protection of buried carbon steel piping which has begun to corrode rapidly in recent years.
The FEED study has been awarded to an EPC contractor for proposing the most suitable impressed...
Hello all,
I work in an operating company in which I came across the below criteria for stainless steel:
Stainless steel may be used in offshore applications up to an operating temperature of 60 degC.
As per my understanding, the above temperature limitation governs in case of sour service...
Hello,
Our Client has asked for an insulation gasket where we have dissimilar material for the piping flange connection. In our case the flange connection is between SS instrument flange and galvanized pipe, while as per our drawings we have a graphite gasket.
Is it required to provide...
Hello,
A Client has asked for solutions to a corrosion problem they are having on an injection pump. Below are the process parameters:
- Operating temperature is 54 degC
- Sour water service
- Chloride levels are in the 1000ppm order (definitely below 100,000pm) but not known exactly
- MOC of...
Hello all,
A valve vendor has offered body material A350 LF2 instead of A216 WCB for 16” ball valves. The operating conditions are as follows:
a. Sour HC condensate
b. operating temperature is approximately 50 degC
c. MDMT is -29 degC
d. 3 phase fluid state
I am aware that repeating queries...
Hello all,
I am designing a simple sacrificial anode cathodic protection system for a Gulf client. The protected structure is a 6", 27 m buried carbon steel in plant piping coated with liquid epoxy (pipe temperature doesn't exceed 40 degC).
I have specified Mg anodes and fink test posts with...
Hello all,
We have 4140 bolts on a SDSS pump casing on an offshore installation. A concern was raised regarding the possibility of galvanic corrosion occurring between the bolts and casing due to the high humidity and marine environment.
My understanding is that galvanic corrosion initiates...
Hello all,
I have come across a statement regarding HIC in a material selection report for CO2/H2S wet sour service application. The statement reads 'equipment operating above 60 degC is not prone to HIC'. Is this indeed correct? If so, can anyone provide a technical reasoning?
Many thanks,
midris
Hello,
Client requirement for produced water re-injection pumps with the following process conditions and parameters is 6Mo super austenitic:
temperature: ~ 70 degC
pressure: ~ 200 barg
chlorides: 157000 mg/l
H2S: 24 mg/l
CO2: 650 mg/l
One supplier has stated that SDSS is better suited to...
