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Hi everybody! Does somebody know where can I find CAD 2D free downloadable drawings of valves and fittings? what I need now is just class 150 and 300 ANSI fittings... gate valve, globe valve, check valve, WN flanges, elbow, tee, and so on... for oil field application... I've been looking for...

Hi everybody! I'm working in a project which involves supplies from USA & Europe (ANSI, ASTM & ISO, DIN standards), so I'd like to have a cross reference, for instance: If I have ANSI B16.5 for Flanges, which the ISO standard for these components? (I know an ANSI flange doesn't match an ISO...

I have a datasheet of a tank to be designed per API 620 standard, and it shows +700mm H2O and -100mm H2O as design pressures. Reading scope at API 620 (1.2.2) I can find 15 psi as maximum internal pressure, no clue about external pressure. I remembered then that API 650 address for a maximum 1...

Does anybody know where can I find tips, specs, ideas, etc for designing this kind of doors, regarding to mechanical issues as power requirements, velocities, mechanical systems and so on...? I'm about to begin a design... Thanks in advance, Heyner Garcia

Hi everybody: I want to know if there's a recommended maximum leakage rates for sluice and radial gates, according the application, let's say: I'm working on a set of gates for a project consisting in carrying water from one river into another. I think this maximum leakage level is not as...

Is it possible to obtain mechanical properties (yield point, resistance, elongation, etc), or some of them, even approximately, by knowing the chemical composition of a steel plate? In this case it is a very low carbon steel, used to build a galvanizing pot, and its compositions is(%): 0.04C +...

Hi everybody! I'm not an expert formulating materials according applications, and I want to know the rules (if they exist) to know if a CS material (say SA516-70) must be normalized, killed, fine grain, and so on. Other question, I want to understand how can I use A516-70 instead of...

I'm receiving some vessel alredy designed, to be used for CO2 at -30°, and stipulated to be ASTM A-283-C. Is it correct to use this material? I'm a newbie in Cryogenic applications... Would you help me understand basics about it? some special tests for materials? Thanks.

Hi everybody! I'm not sure if it is well named as "Galvanizing Pot", the place where you have the liquid zinc to galvanize steel by hot dip proccess. I'm about to build one of this elements, by welding 50mm thk conformed plates. Plate I buyed is specified as NTU USI GV (I don't know if it has...

Hi everybody! I'm designing a DSS hrizontal drum ø84"x180"LTT, and my customer ask in the specs for nozzles analysis per WRC107 and WRC297, giving me the loads per each nozzle size (P, Vc, V1, Mc, M1, Mr). Some softwares I've found talk about the 107 but never mention the 297... I really don't...

Hi everybody: I'm about to start construction of a Duplex stainless steel (UNS S31803) vessel, According to Section VIII div 1 and stamped.(ID=84" TTL=180") Have you experience welding this kind of steel? which is the more recommended process? (FCAW, GTAW, SMAW, SAW, Other). Thickness is 12mm...

Ladies and gentlemen: I'm LOST in the big amount of formulas and "STEPs" in UHX to obtain the thickness of my tubesheet! Is there any way to simplify this method, no matter if the tubesheet has to be a ticker one??? shell od=16" SA-106-B 72 tubes 1" dia. 175 psi shell side. Fixed tubesheet...

Hi Everyone! I'm re-rating a vessel constructed by 1985 and I want to know if the allowable stresses per A515-70 and A516-70 are to be considered as shown on today's section II-D or as shown on that year one... there is a substantial difference there.(20ksi or 17.5ksi?) One more question...

Hi!!!! Don't you think this W+12" at Method C - detail c is too large for clean out opening? What do you know about it? (is it a code mistake?) May be it is b+12" Please help me... Heyner

Hi everybody!! I need to design a flat-bottom tank without counterbalancing weight, per API620. Code states the method shall be a matter of agreement with purchaser. Do you know any method to do this? it is a 162" diameter and 42' height tank, with internal design pressure of 10 psig. I...

Hi everybody! I'm about to prepare a set of calculations for a stamped pressure vessel, and it will be my first time contacting an authorized inspector for approval. I want to ask if you know the basic structure he will want to find in calculations, relevant aspects, and anything you can tell...

Hi everybody! Would you help me define the efficiency to be applied when calculating wall thicknesses for a 1800mm dia penstock? Which codes govern this kind of construction? Is E according to RT examination and weld detail as in ASME? thanks a lot. Heyner

Hi, How do I decide if I need to perform a HT for a pressure vessel designed per ASME VIII-1 code? I'm not an expert... Thanks.

Hi everybody: I'm about to check calculations for a 1800mm diameter penstock flange (to be connected to a butterfly valve). I'm using ASME VIII Div 1, like a loose flange. It gives me a 135mm thick ring plate. Let's say we want to reduce that thickness to 70 mm helping it by using stiffeners...

Hi! I'm working in design of AST's according to API650. Code don't ask for a finished surface in bolting flange of flush-type clean out fitting. Anyway, that´s the way we have been doing it to ensure leakage will not appear. I want to ask: Does anybody know if the clean out fitting works...