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Dear All I am modelling a simple piping system in Autopipe which basically consists of a series of piping runs from a steam storage vessel to three headers i.e. three pipes separately exiting the vessel to each of the headers. In the middle of each of the piping runs is a valve. When I model...

You will need to check the essential variables listed in AS3992 to see if you lie within the allowable variations that do not require re qualification. Bogu

Abbver98 The Australian standard AS1210 covers the design of flanges with full-face gaskets, where the additional moment from the contact outside of the bolt circle is considered as well as gasket factors m & y for full face gaskets. Bogu

Can anyone help me. I am trying to locate the thermodynamic properties of high oleic sunflower oil. ie specific heat thermal conductivity, viscocity etc at 180 deg C. Thanks

Coold You have to use the design pressure x 0.3 as per note 10 of AS4343 together with the volume to arrive at the pv value.Then use the chart to find the hazard level.Using the section for vacuum vessel being section 2.You must also consider note 4 of the table as this may change the pv value...

Hi all Can someone tell me the difference between propulsive and retractive expanding, with regard to tubes being expanded into water tube boiler drums. Thanks Bogu

What you need to do is break the boiler down into sections for the analysis. This is usually taken as changes in flue gas directions. I have designed many fire tube boilers and this is the approach I use. In the furnace you can calculate the heat transfer on the gas side being a mixture of...

Even if the title does show AS / NZS the AS standard is usually accepted. Bogu

Wahlbanger You must first ascertain the hazard level of the equipment as per AS4343. Once you have done this AS3920.1 must be used to ascertain the verification requirements in relation to the hazard level. This is regardless of the design standard used. I have hade to have vessels to ASME...

Dear all I have been advised that the latest copy of PD 5500 has changed the formulas for vessels on saddle supports in appendix G from the 1997 edition. Can some body please advise if this is the case. Bogu

acbdcl The pressure vessel design book by H Bednar has a formula for calculating the collaps pressure in dished ends. Bogu

Hi All Can any body help me with the following I am sizing a water filler steam accumulator i.e. ruths type and usually I use the following relationship (hf1-hf2)/hg where hf1 is the enthalpy of the high pressure fluid, hf2 is the enthalpy of the low pressure fluid ie discharge condition and hg...

Dear all I am working off some old british drawings which call up for carbon steel bolts grade 25T for bolting of table E flanges. can anybody help me with this specification as i am not farmiluar with the 25T grade Thanks Bogu

Dear all Can anybody help me with a dimension sheet showing thicknesses etc for weldolets Thanks Bogu

joshua1 An example would be a heater, which changes the phase of a liquid such a heat transfer oil. Usually the liquid is condensed as a part of the process it is supply heat to and consequently re evaporated through the heater again. As this evaporation usually has to take place above...

jangada BS 1113 gives information on the requirements for expansion joints in furnaces as does AS 1228. I cannot remember if ASME I does. What design standard is your boiler designed to? I may be able to help. Bogu

Mucielago There is an old victorian workcover document on blowdown tank sizing and calculations etc. I can send you a copy if you wish. Bogu.

Dear All Does any body have a copy of the ASME interpretation 8-1-95-38. I have the last three issues of ASME VIII but this page is missing. Thanks Bogu

Johnnymist Believe or not what you have said has cleared up the problem. Many Thanks Bogu

Dear All. I have been asked by a friend to review some calculations on a vessel he is importing prior to submittal to the relevant authorities. The majority of the design is fairly straightforward but at one end there is a quick release lugged flange assembly with a self-energising o-ring...