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Hello, I need to know the ASME standard for design / construction of SG Iron globe valves. I believe ASME B16.34 standard is applicable to steel, nickel-base alloys, and other alloys only. Kindly advise. Thanks in advance.

Hello, I need to know Elevated Temperature Tensile Properties of martensitic stainless steel casting grade CA-40. I searched on internet but could not identify suitable source for this information. Also I need to know if CA-40 material shows drop in corrosion resistance above temperature of...

Alby87, A193 Gr B16 / A194 gr 4 bolting combination has much lower strength values at high temperatures as compared to ASTM B637; which results in higher bolt diameters for the same application. Hence I'm more interested in ASTM B637. Thanks.

Thanks XL83NL for your response. To answer your query on design code: Since these valves are integral to trap module,the applicable design codes are ASME B31.1 / ASME SEC VIII div I.

Hello, I need to select suitable bolting material for bonnet studs / Nuts of a High Pressure valve. Following are the specification: Valve body / Bonnet material : ASTM A182 Grade F91 Body design Condition: Class 2500 Maximum Operating pressure: 220 barg Maximum Working temperature: 610°C...

saplanti, Just to clarify further, branch pipe diameter is same as that of run pipe. Hence branch reinforcement is not possible. Also the ratio of branch to run pipe size exceeds limit mentioned in ASME Section VIII Div I. That is the reason why I would like to take a safer approach to...

blacksmith, Thanks for your response. Brazing won't be acceptable in this case and welding process is mandatory.

Hi, I need to weld a fitting made up of CA-40 (Martensitic stainless steel) material to carbon steel (A106) pipeline. The fitting end connection size is 25NB Socket Weldable. I’m looking for the advice on the following: • Welding consumables (SMAW) • Recommended Preheat Temperatures •...

11echo, The pipes would be made out of plates by rolling and welding a longitudinal joint. These pipes would be further used to fabricate Tee by welding. Hope this clarifies the manufacturing process.

Thanks C2it for your reply. Actually the pipe will be made out of plates by forming and welding the longitudinal joint. I suppose this will need considerations as per para 304.3.5. Kindly comment.

Hello, We need to review designs of fabricated Equal Tees (Sizes- 52" NB Tee & 36" NB Tee) as per ASME B31.3 for low pressure applications. As far as I know, ASME B31.3 won't allow welded branch where branch & run pipe sizes are same. Hence it would be safer approach to analyze these branch...

Hello, I need to refer to the international standards related to following items:- (1) Large size (72" NB ) Tee (Fabricated type) butt weldable ends (2) 72" NB Flanges I referred to standards like ASME B16.9 for butt weldable fittings and ASME B16.47 for large size flanges but their scopes...

Steve, I thought requirements of PWHT are goverened by following:- Material P-Numbers (and not their carbon contents) wall thickness Applicable codes Can ypu pls confirm or comment. Thanks.

Raaden, Referring to the statement:- The test pressure (see A.1.6) shall be a minimum of 1,5 times the allowable pressure at room temperature." I was wondering if there is any limit specified in standards on the maximum allowable hydrotest pressure. Please comment.

Thanks Raaden for your reply. I need to have a basis / reference from EN standard to justify the hydro test pressures & test duration of a PN rated flanged fitting or valve. Very often such references are required to convince the local inspection authorities. Would you be able to help me...

Thanks Jmoore1 for your reply. I need to have a basis / reference from EN standard to justify the hydro test pressures & test duration of a PN rated flanged fitting or valve. Very often such references are required to convince the local inspection authorities. Would you please help me with...

Hello, I referred to EN 1092-1-2007 standard for hydrostatic test pressures & test duration of PN designated flanges. However I could not find any such reference in that standard. If I recall correctly, old versions of applicable DIN standards for steel flanges used to mention minimum test...

Hello, I referred to EN 1092-1-2007 standard for hydrostatic test pressures & test duration of PN designated flanges. However I could not find any such reference in that standard. If I recall correctly old versions of applicable DIN standards for steel flanges used to mention minimum test...

Thanks steamdog for your reply. I checked sussmanboiler website but it seems they make electric boilers upto max pressure of 150 psig only whereas our requirement is 1450 psig.

Hi, We are looking out for an electric bolier (for R&D Lab) with following specifications: Steam flow - 300 Kg/hr Pressure - 100 Barg max Can you pls help me with information on boiler manufacturers? Thanks in advance.