can you tell me thickness calcu........

1200 nb? Do you mean the daimeter of pipe is 1200 mm?

My Dear Mr .A.H galala,

thankq very much for your help.the pipe used for pumping station of fresh water.volume of flow 1500m3/hr Head 45 m(these water is pumped by 4 pumps) .while i decided to purchase the flange, one of our vendor for his spec mention the thickness of 94 mm where as weight of flange is 1.2 tonne .but what i thinking the thkness is too high .hence why i have asking the doubt .further i cannot go through you formulas since lag of experience on design of flange.hence i kindly request you to explain the formulas with simple examples including the values of c,e etc .further i am not a expert(YOUR ANSWER FOR PIPING QUESTION,REALLY HHHAAAA.....) like you.if you assist me it will more helpful to me .since i am a new guy for piping field.really i am a INDUSTRIAL FAN guy.now i shifted from my field to project field.

To proceed a design of a piping system, there must be a piping engineer (or process engineer), who can prepare the line datasheet or at least inform us with the rating of flanges of piping system (may be 150#, 300#, ... etc.).

If you know the rating of standard flanges (by knowing: design pressure, design temp., and material of flange), you can inform the supplier with all data, and he will provide you with the required flange.

So, to buy a blind flange, you have to specify:

- Flange size (NPS)

- Flange facing (RF, FF, RTJ)

- Flange Rating (class)

- Type of flange (WN, SO, SW, RTJ)

For example (just for example) :

- To specify a blind flange : NPS 12", RF, 150#

- To specify a welded neck-raised face flange: NPS 12", WNRF, 150#, Sch. 40

DEAR Mr GALALA

The flange standerd is ANSI B 16.5 #150 NB-1200

What do you mean with NB-1200? Is that the Nominal Pipe Size (NPS) of pipe?

If NB-1200 means the NPS, its standard writing shall be DN (not DIN) 1200, that equivalent to NPS 48" (Is that size 48" what you mean?), and its flange shall be specified by ASME B16.47 not ASME B16.5.

Where ASME B16.5 covers only flanges with NPS 1/2" (DN 15) through NPS 24" (DN 600), and ASME B16.47 covers flanges with NPS 26" (DN 650) up to NPS 60" (DN 1500).

A. Please let me know the followings to facilitate finding the flange rating (class):

1. Flange material (is it carbon steel A105?),

2. Design pressure, and

3. Design temp.

B. Also by knowing the followings, I can derive all the flange dimensions:

1. Flange nominal pipe size NPS, and

2. Flange rating (class), (derived from A above).

3. Pipe schedule (pipe wall thickness).

dear Mr A.H.G

PIPE ID-1200

PIPE OD-1220

ERW-BE10

ANSI-B36.1

dear mr A.H.G

Thankyou very much for you r guidance.further in half of the weight how it equilant to blind flange .if half of the weight means cost also 50% .is it acceptable standard practice? pls explain me

is it acceptable standard practice?

Yes, it is the best solution, and we can use a Socket weld SW (or slip on SO) flange instead of welded neck flange WN, to be welded directly with the cap.

I can send you a simple drawing showing the assembly of WN flange to the cap, please send me your e-mail.

Once again thankyou mr A.H.G

you wont beleive ,if i am go through your suggestion my total cost will be reduced by INR 4,20,000 by reducing the weight by 50%.

OK sundararavi,

I send the e-mail, you are welcome.

Myb dear Mr a.h abujalala.

thankq for sending the drawing.due to your suggestion we were able to to reduce the cost by INR-4,20,000.MAY I KNOW WHICH COUNTRY YOU BELONGS TO. your sugestion are very helpful to engineers ,those realy facing the problem on daily work .I remember my college days that one of my proffesor told me that,what ever we aquired that should be useful to others.ex for that you.i onceagain i told you many thanks to MR.JALALA.and CR4 Societies

Thank you sundararavi,

I am Egyptian engineer, born to one of the Ancient Egyptians, the designers and builders of Pyramids. I am a mechanical design general manager on behalf of Cairo Oil Refining Co. (CORC). I live at Cairo.

The Pyramids of Egypt, among the largest constructions ever built, ^[1], constitute one of the most potent and enduring symbols of Ancient Egyptian civilization. The number of pyramid structures in Egypt today is reported by most sources as being between 80 and 111, with a majority favouring the higher number.

All Giza Pyramids. Zoom in to get a sense of proportion.

Also, you can see the following CR4 thread : What is in the pyramid shape that fascinated the ancients?

As Salaam Alaikum Wah Rahmatullah.

Dear Brother Abdel Halim,

Could you please provide me with some calculations or formulas to find out the minimum length of API and ASME B3.16 Weld Neck, Blind and Adapter (Flange by Flange) Flanges ?

Your repy would be very appreciated.

Regards,

ALLAH Haafiz.

Dear Mr .Abdel Halim Galala,

I am also intrested to get this detail and my mail id is sd610@rediffmail.com, blackie510@rediffmail.com and pl. send the data as sent to cuddalorearavi which will be useful for me also.

Thanks.

DHAYANANDHAN.S.,

CR4 MEMBER,INDIA.

Note: We have been communicating each other some 5 months back and you have sent an attachment to me to my mail id. which was not opening in the thread.

W = total bolt load given for circular heads for Formulas (3) and (4), 2-5(e).

where to find this 3and4,2-5e in sec viii-1plz help mail me at viksurs@gmail.com

All are located at:ASME VIII-1, Mandatory appendix 2 "Rules for Bolted Flange Connections with Ring Type Gaskets", and a copy shall send to your e-mail.

Dear sir,

What is the units of all term in your formula.

If you let us know:

1. Pipe Outer Diameter mm and
2. Wall thickness mm

And confirm that you can go by technological necessity and not by Some Rules

Nor by Contractor's Turn-key bid offer.

Nor that your Awarding Committee will insist on Bidder's offered flange dimensions

Then Post these and wait for " non-standard"

But Necessary and Sufficient Optimum Flange Dimension/specs.

Refer to the flowsheet for the process. The piping code should be found on it. Simply order a blind flange to that piping code for 1200mm diameter pipe.

• For design of Non-Standard Flanges (integral & blind), see CR4 Thread Flange Hydro Pressure Analysis and you can download the following samples of design calculations: Flange_Design_Calculations.PDF & Blind_Flange_Design_Calculations.PDF.

ASSALAM O ALIKUM and thanks for all your comments. I am calculating the bolt lengths for the flange connections of one of the projects based on there specific requirements.

I am unable to get the blind flange actual thickness which I heard is always thicker than normal weldneck flange of the same rating and size.

Can you please guide me where can I get the actual thickness of the blind flanges???

if you can send email to me that will be really great.

My email is rsaeed@enerflex.com

Dear Saeed,

The following link Trouvay_Cauvin -_Piping_Equipment is a free download handbook for Trouvay Cauvin Co. which contains all tables for all pipes, flanges, fittings, stud bolts, ... etc.

1. Just download the file, and open it, then click the last file TCPIPING.

2. At the 1st page of the book (Contents), select Flanges and Sealing Products titled with the number 3, then click that number.

3. Go to the stud bolts tables at page 46 of 59.

4. Select the table of stud bolt in accordance with the flange class/rating, like 150#, 300#, .. etc., and from which you can find any dimension you need.

Very Important Note. The thickness of blind flange is exactly equal to the thickness of flange itself (dimension C). So the dimensions of stud bolt used to connect two WN flanges is the same dimension of that used to connect a flange to its blind flange.

.............................

Dear All,

Can anybody guide me about material selection. We only want to select the blind flange for hydrotest only. We will not use it afterwards, The test pressure is 40 barg. The OD is 2.3meters.

MA