Hammer Union Threads for larger size

[Dinu Stan]

Hello Everyone,

I am facing an issue related to hammer union Female sub thread identification for a higher size as well pressure rating.

I require 6" Fig 2202 Sour Service Female Sub. Can anyone suggest the ACME Thread size for the same.

right now I have selected the 6 11/16 - 5 ACME 2G as same as from 3" Fig 2202. since i am very new to this field, I request to help me to get some details from the representatives.

Thanks

Dinu...

There are no secrets to success. It is the result of preparation, hard work, and learning from failure.

 

[LittleInch]

That's a big size hammer union for that pressure (15,000psi). Nothing I've seen goes above 3" or 4".

You're going to need to ask whoever is supplying you with them.

This site has a lot of engineers, but not many vendors.

How have you "selected" the thread size?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Dinu Stan]

Hi. Thanks for your reply…
I require some engineering details for design this hammer union. Since we have a requirement for one of our customers with this bigger hammer union. I have selected the basic dimensions based on the benchmarking of various similar sizes and pressure ratings of market available products and api standards. But i need to confirm the same. I have a big doubt about the thread as of now. So i need some assistance to complete this task.

Thanks

Dinu...

There are no secrets to success. It is the result of preparation, hard work, and learning from failure.

 

[jmec87]

I have never seen or even heard of 6" 2202. You are likely the first to make this size, so you can use whatever you want! However, try to ensure that it won't mate up (even loosely) with any existing hammer union connections or you could have some catastrophic failures (as was previously seen with 2" 602 and 2" 1502 prior to API RP 7HU1).

Alternatively, if a customer is asking you for 6" 2202, you should check if they are connecting to some other 6" 2202 from another manufacturer and then ensure that your design is compatible (including the same thread) with the other manufacturer.

 

[Dinu Stan]

There are few manufacturers who produce 6” fig 2202 in india. Sofar i have had a benchmarking and identified few dimensions based on some logical methods. Moreover i have done some cross verification of those details with competitors. But the problem is with the threads and sealing portions of female sub. However here we are going to use HNBR with Brass metallic anti extrusion sealing where the housing design would be bit difficult. So i am planning to requesting the supplier with the basic details of ID and Pressure rating to provide the required housing. So rightnow thread would be the biggest challenge that i would like to go with 8-3/4” 3ACME which seems to be more strong and can withstand the high pressure too…

If i am wrong, please do correct me. Because i am working these things without any prior experience. I have all my experiences in Valves and Chokes both API and ASME . Just i have entered into these kind of pressure fittings and wellhead equipment designs.

Thanks

Dinu...

There are no secrets to success. It is the result of preparation, hard work, and learning from failure.

 

[jmec87]

There are few manufacturers who produce 6” fig 2202 in india. Moreover i have done some cross verification of those details with competitors. But the problem is with the threads and sealing portions of female sub.

If your 6" 2202 is intended to mate up with their 6" 2202, then you absolutely need to make sure that the threads are the exact same.

If your 6" 2202 is intended not to mate up with their 6" 2202, then you need to ensure that yours physically can't thread together with theirs. Even with a slightly mismatched thread, mating can be possible and lead to deadly failures - see attached reports for pre-7HU1 failures of 2" 602 connected to 2" 1502.

[URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1629217687/tips/sa99-33_dyb209.pdf[/url]
[URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1629217687/tips/sa03-16_iterz0.pdf[/url]
[URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1629217687/tips/sa00-15_aybsdy.pdf[/url]
[URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1629217687/tips/sa06_03_j5dbuo.pdf[/url]
[URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1629217687/tips/SA98-01_bs0hsc.pdf[/url]
[URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1629217687/tips/sa-06-01_xxfzeu.pdf[/url]

 

[jbeckhou]

API uses 8-3/4"-4 2G for their 6"-1502. I've never seen a 2202 and it's not shown in API 7HU2.

Petrotrim Services, LLC

http://www.petrotrim.com

 

[jmec87]

API does not have a 6" 1502. There was a version of 6" 1502 included in a draft of API 7HU2, but it has been removed in the current draft. API 7HU2 has not been published yet.

 

[Dinu Stan]

Hello Everyone,

I have used 9 1/4" - 5 ACME-2G thread for the 6" Fig 2202 and I have verified the strength with the calculations.
Right now I am looking for the sealing hub dimensions and sizes. here, I have selected the ID 108mm based on the pipe schedule for sub, any idea about sealing hub dimensions, since seal has soft part with a metallic ring?

Dinu...

There are no secrets to success. It is the result of preparation, hard work, and learning from failure.