Question and Answer 101-110 www.wermac.org

Question 110: i feel it is online training for people who are opting to work for oil and gas and other related sectors

Dear Werner
I would like to thank and congratulate you with great respect and appreciation for your efforts of educating engineers and non engineers for oil and gas pipings and equipments basics, which helps them in there day to day work for respective field.
I feel it is online training for people who are opting to work for oil and gas and other related sectors.
I wish you all the best for this great effort and cause.

With Best Regards
Shamim Ansari

Answer from Werner Sölken

Thanks, Shamim Ansari

Werner

Question 109: is raised face smooth suitable for spiral gasket and non metallic gasket?

Dear Sir,
I really appreciate your website, my question is:
We have 60in flange with RF type CL 150 ANSI but its raised face have not any serrated ( it is raised face is smooth ). Is it suitable for spiral gasket and non metallic gasket ? for what kind of application is this type ?
Thanks & best Regardsh. khajevand

Answer from Werner Sölken

Hi,
My answer can be found on (bottom of page): Flange Face Finish

greetings Werner

Question 108: steel flanges or spacer according ASME 16.48 in dimension 28in

Hello!

We are manufacture of plastic piping systems. Our customers asked for blind flanges acc. ASME 16.48 for hydro testing the pipeline. Now I want to ask you about steel flanges or spacer according ASME 16.48 in dimension 28". Is this available and do you have the dimensions of this flanges?

Thank you very much!

Mit freundlichen Grüßen / Kind regards
Schranz Michael

Answer from Werner Sölken

Hi Michael,

Blind flanges, according to ASME B16.48 do not exist. ASME B16.48 is the standard for Line Blanks, and the range is NPS 1/2 to NPS 24.

greetings Werner

Question 107: rotate a spectacle blind from one position to the other

I really appreciate your website and, as an engineer who is relatively new to piping, I have learned a lot from it. I just wanted to give you my thoughts on your own comment at the bottom of your spectacle blind web page. Initially, I agreed completely with you - it's not a simple matter to rotate a spectacle blind from one position to the other, so why even bother? After spending some time thinking about it I realized something. If you put just a blind between a pair of flanges, it is not obvious what is between those flanges. Certainly it should be tagged but it could be a blind, a ring spacer, an orifice plate or a piece of specialty equipment and there's no way of knowing unless you go up and read the tag. On the other hand, if a spectacle blind is used, it's completely obvious at a glance what it is, and furthermore whether the line is blinded or open. This could save crucial time in the case of an emergency.

Anyways, these are just my thoughts. Keep up the good work!
Grant Anning, P.Eng.

Answer from Werner Sölken

Hi Grant Anning,

There are many ways to make it clear whether a blind or spacer is placed.
Examples:

  1. As a red stem is visible, a blind is mounted.
  2. With a blue stem, a spacer is mounted.
  1. If only a stem is visible, a blind is mounted.
  2. If a stem with an open ring is visible, a spacer is mounted.
    etc. etc.

Another disadvantages of a spectacle blinds:

  1. there must be sufficient space available, to rotate de spectacle
  2. especially in an outdoor environment, the spacer or blind will rust, resulting in a poor seal

greetings Werner

Question 106: how can they both be rated for a class 150 if they are different thicknesses?

Hi,
Can I just start by thanking you for the website - its a very useful tool.
Now a question if I may.
I have a stainless steel pipe system which has schedule 40 pipe and class 150 flanges and 2 piece flanged ball valves but I notice there is difference in the thickness of the flanges between the on the valves and the welded on flanges.
The weld on flanges are thicker than flanges on the ball valves.
My question is - how can they both be rated for a class 150 if they are different thicknesses? and more importantly the mechanical strength of the ball valve flange must be less than the welded flange.

Your comments would be appreciated
Cheers
Andrew

Answer from Werner Sölken

Hi Andrew,

I guess ... the standard is ASME?!.

If the valves are not ordered according to ASME B16.34/B16.5/B16.10, then you have valves, which do not meet these standards.

ASME B16.34 defines: the flanges of flanged valves shall be in according to ASME B16.5.

ASME B16.10 tells you all about the face to face dimensions of a valves.

After following your message, I have controlled a lot of suppliers.
My conclusion: It is a mess on the WWW, in terms of (serious) valve suppliers.

greetings Werner

Question 105: what is the outer dimension for the rtj flanges and hole dimensions?

Dear Sir,
What is the Outer dimension for the RTJ Flanges and Hole Dimensions for the the same.
Is there any standards book available on web?
We have urgent requirements for DRAWINGS of the WN RTJ Flanges.

Thanks in advance for your kind co-operations.
Thanks & Regards,
Hemang Mehta / Gujarat-IndiaBusiness Development

Answer from Werner Sölken

Hi Hemang Mehta,

What is the Outer dimension for the RTJ Flanges and Hole Dimensions for the the same.
Dimensions Orifice Flanges RF

Is there any standards book available on web?
I do not know.

We have urgent requirements for DRAWINGS of the WN RTJ Flanges.
Use the images.

greetings Werner

Question 104: how much would the pipe shrink?

Hi,
I am trying to get some information on different metals from Carbon steel pipe to Alloys and Stainless Pipe Sch 5 up to Sch 160. I am wanting any info on how much pipe will shrink after welding.
(SPOOL LENGTH NEEDED 1154MM) If you were fabricating pipe that was a 4" pipe 1000mm long with 2 x 4" weld neck flanges on the end of the pipe, total length 1154mm plus 2 x 3mm weld gaps total length of spool before welding 1160mm tacked up. How much would the pipe shrink? would you allow for the 2 x 3mm gaps in length or cut the pipe to length???.
Any info would be great, Any data would be much appreciated.

Thank you
Dave Melrose

Answer from Werner Sölken

Hi Dave,
Sorry for my late reply.
Next Monday, I'll ask the best pipe fitter I know; it's a matter of experience and craftsmanship.

greetings Werner


Hi Werner,
Thank you for the reply look forward to the shrinkage info on small bore and large bore pipe.

Thank you
Dave Melrose

Answer from Werner Sölken

Hi Dave,
As promised, today July 2, 2012, I contacted a number of welders and pipe fitters (One opinion is good, but more opinions are better in this case).

The total length of the pipe spool must be 1,154 mm.
For example: 4"-Class 300 WN flange height is 85.6mm, and the weld gap is 3mm.
Sum: 1154 - 2 x 85.6 - 2 x 3 = The straight pipe must be 976.8 mm.
Summary: The pipe spool will not shrink after welding.

The basis for this assertion is that a skilled pipe fitter and welder performing the work.

Other important aspects are:

  • Depending on the wall thickness of the pipe and WN flange, the welding gap must be wider or narrower. Thin wall = narrow gap, thick wall = wider gap.
  • The pipe fitter and (welder) must ensure that the lateral translation, the rotating and the aligment or flanges, completely correct.

greetings Werner

Question 103: are raised face flanges the same dimensions as large male face flanges?

Are raised face flanges the same dimensions as Large male face flanges?
1500# class...

Thanks,
Monty

Answer from Werner Sölken

Hi Monty,

According to ASME B16.5 bolthole circle, diameter of boltholes, number of boltholes, outside diameter of raised face, height of raised face etc. are the same.
Inner diameter of the raised face of course is not the same.
Which diameter is larger, while the width of the raised face, is narrower

This applies to all pressure classes from 150 to 2500

greetings Werner

Question 102: if you plan on adding anything like flow cartridge housing, bag housing...?

Hi Werner,
I just cant thank you enough for all the helpful information I found on your website I think that what you have created here for piping industry is great! My company specializes in filtration and separation and I was just wondering if you plan on adding anything like pressure vessels such as high flow cartridge housing, bag housing, coalescers etc. to your site? If so I would be more than happy to assist you in any way possible.

Thanks again for your wonderful website
Regards
Terence Yoo
Ontario, Canada

Answer from Werner Sölken

Hi Terence,

I received your email on June 27, 2012 (European time).
On 25 June I put online a short article about Y-Type and Basket strainers.
Coincidence?

Well, thanks for your compliments on my website.

I visited your website, and was surprised about the Nuen "filter" products. A wide range of products and very well displayed on the images.

Indeed, I would add articles about the type of filters that I've seen on your website. Thank you, that you want to help me, and I will not hesitate if I need assistance.

greetings Werner

Question 101: why 14" and above pipes have od = nps

Sir,
I have a question in mind about dimnentioning of pipes.
Why 14" and above pipes have OD = NPS, 12" and below is refered for ID.

thanks & Regards
Abhay

Answer from Werner Sölken

Hi Abhay,

NPS and Schedule gives answer to you question.

greetings Werner

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