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Hi, we have several heat exchangers with CS + Ti cladding on tubeside selected because the service is sea water (máximum operating temperature: 47ºC). The tube and the tubesheet shall be Ti and CS + Ti cladding (tubeside) respectively with a strength weld joint. My question is: 1) Any...

hI, for a pump operating wiht naphthenic acid content > 2% (atmospheric residue pump) and 339ºC, the proposed material for shaft is Duplex SS (UNS 32205). I know the resistante for such organic acids depends on the alloy content. For high naphthenic acid content-high turbulence and high...

Hi, we are fabricating a heat exchanger in CS + SSTp 317L weld overlay due to nafthenic acid corrosion. Our design has more than six passes and according to API 660, carbon steel channels request PWHT in order to reduce residual stresses by welding. But also in API 660 para.6.6.5 says textually...

Hi, we are fabricating a heat exchanger in CS + SSTp 317L weld overlay due to nafthenic acid corrosion. Our design has more than six passes and according to API 660, carbon steel channels request PWHT in order to reduce residual stresses by welding. But also in API 660 para.6.6.5 says textually...

Hi, for a SA 179 material, our Client has requested a minimum content of Silicium of 0.15%. According with the mentioned specification, no Silicium is reported as mandatory but our doubt is due to the paragraph 8.2 which states "suppliying an alloy grade that specifically requires the addition...

Hi, for a normalized SA 106 GrB and SA 105, is it supposed to be a fine grained material as well? Thanks Peter

Hi, the bolts material specified for assembly of WET SOUR process piping (non exposed to fluid) was SA 193 B7M. Due to a mistake in our material take-off software, SA 194 Gr L7 was specified for nuts instead of SA 194 Gr 2HM (22HRC). This material is qualified under a hardness (24-38 HRC)...

Dear All, what is the meaning of short time tensile strength? This statement is indicated on mentioned Standard para. 7.8.9: "Allowable stresses that have been established on the basis of short-time tensile strength shall not be used for the design of girth flanges, gasketed tubesheets and...

Hello to all, i would like to know why it is required side bend tests when the base metal thickness used on qualification is over 19 mm instead of Root&Bend tests. Which is the purpose? Thanks for your supports. Peter

Hello to all, i have a H&E with titanium tube SB-338 Grade 2. Providing that the type is BES, is it possible to use a clad titanium tubesheet (shell side) or it must be solid? What about baffles? Thanks Peter

Hello to all, would you recommend me a software related material selection for line pipe on sweet and sour service? regards Peter

Hello to all, we have a multitube heat exchanger (minimum center to center diameter: 14") with tube bundle according to UNS 39274 (superduplex) cold formed and solution annealing(U-bends and 12"). The tubesheet layout is square pitch (1") and the U-Bends have been formed according to triangular...

Hello to all, we have a multitube heat exchanger (minimum center to center diameter: 14") with tube bundle according to UNS 39274 (superduplex) cold formed and solution annealing(U-bends and 12"). The tubesheet layout is square pitch (1") and the U-Bends have been formed according to triangular...