Hot tapping a chilled water system 1

[drfox]

Looking for info, pitfalls or ? in determining a job involving tapping an 8" supply and return from a central plant for a small job. Approx 2" will be used. Capacity is not an issue.
I am just looking for info like,,, "better have lots of buckets nearby" or need 3' clearance around each pipe. You know if you have done it before. So as I typically read the questions and answers here, I ask you guys.
Thanks,

 

[TBP]

Check out companies like Ridgid. They make rigs for this exact purpose. I believe they're good for a variety of fluids like water, compressed air, steam to 150 PSIG, etc. You'll likely need 2 or 3 feet of clearance on the side of the pipe you're planning to tap.

 

[KenRad]

drfox,

The most important bit of advice that I can offer is to find a mechanical contractor who has a good deal of experience with hot taps. If they have the proper equipment and know how to use it, hot taps are a great way to create a new branch connection, with virtually no loss of system fluid. If they are trying to get by with a homemade hottap rig, find someone else.

Of great importance is retrieval of the hole saw plug. Make sure that after they drill the pilot hole, they use a spring loaded hole saw arbor, which will capture the plug. Also spec that they turn over the plug to you, as proof that it's not floating through your system. Make sure that they use a 2" weld-o-let, and a 2" full-port ball valve. And yes, the equipment will need about 3' of clearance.

--KenRad

 

[briand2]

I agree with KenRad, but I feel I must point out than on two separate occasions I lost 130 tons of chilled water from the system as a result of hot tapping operations going wrong. Also, needless to say, the water ended up in very embarrassing places and took some time to clean up/dry out!!!

Nevertheless, the number of successes and the time they saved makes hot tapping a realistic option, even for me. I just accept that it is not risk free (but what is?).

Regards,

Brian

 

[naraloka]

We have to design a ventilation system for a compressor room. The area surrounding this plant room is very dusty and if supply air is to be used then filters need to be used. The room temperature is to be maintained within 5 deg C of the ambient which is max 44 deg C in summer. I appreciate any information on how to design, equipment and type of filters to be used.
Thanks in advance

 

[drfox]

Hey naraloka!

You posted a question on the end of an old topic.
You may want to repost as a new thread.
As to your question, I only can offer this; Lots of surface area. Good luck.
Fox