Search results for query: *

Good question shvet! The P&ID's have been developed by the client (who is UK based) over a number of years without real specific reference to one of the available standards, other than (probably) BS 1646-1 which is now withdrawn. But in answer to your question, it would probably be against BS...

Wonder if anyone can advise as to what the 'proper' P&ID symbol for a metering / dosing pump might be? Struggling to find much on-line but did find the attached link on 'Northridge Pumps' site. Is this symbol in general use for metering pumps? (Background is I have a load of clients P&ID's...

Hi GD2. Not sure if I understand what you mean as I'm not familiar with how 'UNS' works. Maybe you could clarify or point towards how 'UNS' may help? Thanks.

Thanks LittleInch. In addition to your suggestion, there is also P250GH (material no. 1.0460) which is a Group 3E0 material i.e. "unalloyed steels with guaranteed elevated temperature properties". A105, which is one of the 'Additional Materials' given in Table D.1 is also shown as Group 3E0...

Thanks David. I suppose my very specific question is - what is the EN (or BS EN) equivalent to A105 for flanges. I am having to specify BS EN 1092-1 flanges for a steam application (at 10 barg / 200 degC) and it's proving difficult (to me anyway!) to home in on the equivalent. It would appear...

Thanks 'LittleInch'. Good points regarding comparison of physical properties! There are these kind of things I've seen on the web which on the face of it, look useful: https://vmsteel.com/wp-content/uploads/2020/04/material_comparaisons.pdf Clearly, someone, has put a lot of time and effort...

Is there a definitive document / publication I can refer to to give me up to date and accurate materials equivalents between the various national standards? ASTM to DIN to BS EN etc. I've found a number of manufacturer's tables and comments online but this being the 'internet' I'm not sure that...

We've been specifying and using the proprietary Deepwater I-Rod and NuBolt system as an aid in minimising crevice corrosion at pipe support locations. Generally successfully. https://stoprust.com/i-rod-pipe-supports/ But a question has arisen with regards to possible static build-up (due to the...

OK, thanks.

The 2007 edition of BS EN 1092-1 had a National Annex with guidance on P/T ratings for S235JR flanges. The 2018 version of BS EN 1092-1 has had the P/T National Annex removed. Does anyone know how the P/T rating is now determined for S235JR (1.0038), Group 1E1 material flanges?

Hi MortenA. I know that this is 'off topic' with regard to my initial question but in response to your comment: PED and PSSR have different scopes; - The PED covers new manufacture of pressure equipment and is / was EU-wide - The PSSR cover in-service use of pressure equipment, is law in...

A question with regard to the applicability of the Pressure System Safety Regulations. As many of you will be aware, one of the criteria for the PSSR to fully apply, is the is the 'bar x litre' value to be 250 or greater. My question is, can you 'lower' the capacity value used in this...

Thanks, guys, for your comments. Fortunately, our studs are only 3/4" max. so the -40 criteria (for B7's) doesn't apply in our case. But useful to know. And thanks 'GBT' for pointing me in the direction of the Portland Bolt resource. Some very useful information on there, including comment on...

Many thanks for the comments. Funnily enough, my 'conditions' are also related to an LPG/propane duty - in 'boiling' conditions, hence the -42degC. So, just a further question - and I'm asking as I don't have the 'source' standards to hand. I'm generally aware that nuts to A194 Gr. L7 are...

We traditionally have specified a B7/2H combination for 'normal' piping operation (typically up 20 bar and ambient temp. conditions). We also have a 'low temperature' requirement where the minimum temperature can reach -42degC (-44degF). In these 'LT' conditions, we have typically specified...

Hi all. Does anyone have any 'worked examples' of the the sustained load calulations in para 320.2 that they might be able to share or 'signpost' me towards? I'm not talking about a 'Ceasar' print out, rather a typical 'manual' example of how the calcs work? Many thanks.

Many thanks for the help and links on this. All very useful!

Thanks Nick. But not quite sure what you're saying? The BS EN standards I've referenced very much do cover check valves of the type in question? I will investigate API in due course but prefer to stick to BS standards (as per the general requirements of my UK based operator) at this moment in...

I don’t recognise the manufacturer myself but might be worth reaching out to someone like Shipham Valves (in the UK). I’m being subjective here but I know that they’ve done ‘strange’ sizes in the past. http://www.shiphamvalves.com/

Could I ask, what national / international standards are people using for design of pipe supports? In the UK we had BS3974 but this is long withdrawn but not, as far as I can tell, not been replaced. I’ve also seen reference elsewhere to ANSI MSS SP-58. Was wondering if this is a suitable...