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Is CS + Alloy 625 weld overlay required for SEAL AREAS of SCRAPER LAUNCHER in sour system ? or an alternative sealing material prefered ?

Can GRE materials to be used for buried and above ground FLOW LINES with hydrocarbon well production fluid Contain high H2S (> 3% H2S and Co2 >3%) problem due to permiation of gases through the pipeline wall?

Is there any requirements for PWHT due to application of Weld Overlay (CS backing material + Alloy 625-3mm weld overlay) on piping, manifold?

Dear All, What is the upper/lower limit cathodic protection criteria for coated buried DUPLEX STAINLESS STEEL pipeline in soil. Thanks Best Regards

Steve, Thanks for your reply. The possible liquid metal embrittlement , comes from the Zinc in the Brass? or other metal ?

Polypropylene (Modified - PP) field joint coating, flame sprayed, 8mm thick, on epoxy (FBE). There is no adhesive layer between the FBE and the PP (the adhesive property comes from the PP?) the problem is the adhesion between the FBE and the PP in not good, easily comes off. The test was...

Dear all, Can PIN BRAZING be made on the CAST IRON or DUCTILE IRON pipe? If so, what kind of pin brazing materials can be used. Also if pin brizing can be used for Stainless Steel pipeline? As there is Zinc in the stud materil (Stud -BRASS), would have effect on the Stainless Steel.

Polypropylene (Modified - PP) field joint coating, flame sprayed, 8mm thick, on epoxy (FBE). There is no adhesive layer between the FBE and the PP (the adhesive property comes from the PP?) the problem is the adhesion between the FBE and the PP in not good, easily comes off. The test was...

Dear All, For buried stainless steel pipeline, in possible corrosive environment (pitting/crevice corrosion/MIC), what type of corrosion prevention would you recommend? Thanks

Thanks for your reply, I do not know about the metal film, metal oxide, and also does not to be very accurate. where can contact / I find the BTW (I not Familiar with the term)? BTW, there is a component forum which might be a better place for future questions like this.

Ed, The SS - 316 buried pipes in Japan, have CP? Regards

The SS - 316 buried pipes in Japan, have CP?

Dear ALL, Please can you tell me which one of the Resistor are more stable (to be used as a shunt), Carbon Film Fixed Resistor or Carbon Composition Resistor for measuring the potential across the resistor, in order to calculate the current passing through (for sacrificial anode cathodic...

Thanks, highly appreciated.

Dear All Is the product corrosive to carbon steel with 20% water. Also what type of material should be used for the gasket for the flange. Thanks

Is 316 SS, susceptible to pitting/crevice corrosion in stagnant groundwater at less than 30 deg C. with chloride in the range of 2000 ppm. Also possibility of MIC (SRB) corrosion in swampy.

Hi, Thank you very much for your reply. Due to difficulty of access in the pit and availability of the spraying equipment, can we just use a suitable coating for stainless Steel (such as Epoxy Coating) instrument units? Regards

Hi, Please advise, Thermal Insulation of instrument units (316 SS), in Immersed condition (High Water Table). The possibility of corrosion, due to differential concentration of oxygen (depletion of oxygen at fastener locations – tying strip) – CREVICE Corrosion, pitting and cyclic effect of...

Hi, Please can you advise, a coating for 316 Stainless Steel (Instrument units) in Immersed / Buried Condition (High Water Table). For normal Temperature.

Hi, Please can you advise a coating for 316 Stainless Steel (Instrument Unit - normal Temperature) in immersed/buried condition (High Water Table.