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Flange Adapter
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(Civil/Environmental)
(OP)
22 Nov 02 14:14Hi Eng's!
Just a practical question: on a 10" line with meter and valves I want to use a Flange Adapter (UNIFLANGE) as provision for disassembling the items. So there is a short pipe spool with flanged ends - one flange would be a welding neck flange and one would be a flange adapter. Does that one adapter flange is good enough to provide a sufficient gap for taking the pipe spool piece out and back in, with the both gaskets for both flange ends? I have seen people using adapter flanges at both ends - is that necessary? Thanks!
Replies continue below
(Electrical)
22 Nov 02 15:42Hi Chris,
If you follow Uniflange installation instructions, you will be able to remove your inline valves & meter and replace with a spool piece. Check that the spool piece length is just short of the neck of the flange adapter, makes it easier to fit and remove.
By neck distance i mean the length inside the fl. adatper to the neck, which is just in front of the gasket.
If the valves etc have been in a long time and on say a sewage/wasterwater application it can be difficult dismantle, takes time and a bit of cursing but eventually the fl. adapter will come off.
Clean it up and you may be able re-use it, although manufactures may not agree, but we have many many times.
Good Luck
Bob
(Civil/Environmental)
23 Nov 02 13:53Chris:
I have used them but prefer to put a smith-blair coupler in line somewhere, it give the maint people a lot more room to work with.
BobPE
(Mechanical)
24 Nov 02 21:29Chris73,
Putting one flange adaptor will surely give you enough clearance to remove the valves and the meter. I didn't get the catalogue with me but I think a 10" flange adaptor will give you a clearance of at least 38mm.
Why sometimes we put two flange adaptors? Not because for the clearance, but is for pipeline alignment. Other than offering clearances, flange adaptors also offers an angle displacement (~15 deg), so if your pipeline is misaligned a bit, you can use the flange adaptors to make the adjustment. This can be found easily in valve/meters pit where the two puddle pipes are always misaligned.
Just another note: Flange adaptors are fixed to the pipe (spool) with its wedged rubber ring. Try to avoid asking it to withstand any thrust or it will comeout. Use "tie-rods" if necessary.
(Civil/Environmental)
(OP)
27 Nov 02 13:40bhwtam;
I think you have a flange adapter like Smith-Blair 912 mind. In order to save some room I would like to use the Uniflange version, which is slimmer. Further the flange is fixed with set bolts to the pipes outside. At least Uniflange promises a 'built in thrust restraint' with that. I don't know if I would rely on that (any experience with that out there?) but in my case I won't apply much thrust to the flange. Uniflange gives a max. distance of 6 mm to the mating flange - so I am not quite sure if that gives me enough play for disassembling the 10" flanged pipe spool (concerned about the re-installation of the flange gaskets!)
Link to Solid
(Mechanical)
28 Nov 02 12:23I think 6mm clearance is not enough for your re-installation as the gasket will not be totally flat when you put it in and once it touches the side of the flange, it won't go in any more.
(Civil/Environmental)
28 Nov 02 23:04On one side of the spool piece use a mech. joint coupling. cut the pipe an 20-25 mm shorter than it should be. Then you can loosen the other end of the flange piece and move it for clearance. Your joint config. will be downstream flange, upstream flange and mech joint. you should put in tie rods for stability under working pressures.
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Flange adaptors are considered to be a type of dismantling joints that works to join plain-ended pipe to flange valves, fittings, pumps and pipe; virtually all types of process and liquid equipment. There is no requirement for threading or welding for flange adaptors and serves the purpose of correcting pipe misalignment.
At Dutco Tennant LLC, we supply high-end flange adaptors and are taking this product for the exhibit in WETEX . The event will commence from 27th September &#;22 and conclude on 29th September &#;22. Be sure to be present at our exhibit as our expert representative will be delivering live demos and other more insightful offerings.
But before you make a visit, read this blog to learn all things essential about flange adaptors now. Keep reading till the end to find out.
The Ultimate Perks/Features of Flange Adaptors
Offering longitudinal adjustment
With the use of flange adaptors, operators are able to achieve maximum 2&#; of longitudinal adjustment based on the diameter. This adjustable result is able to be obtained due to the telescopic action of the flanged spigot present within the flange adaptor.
Once the required length is attained, with the dismantling joint&#;s use, this length can be locked with the help of tie bars supplied. With the completion of longitudinal adjustment, operators can get rapid and simple maintenance of pumps, valves, etc.
It also enables simplifying future modifications of piping, often resulting in lesser downtime and getting rid of the need for more complex anchoring systems.
Better Sealing Performance
The gasket of the flange adaptors is independently compressed of the tie bars. Compression of the gasket is able to be achieved by going through standard flange adaptor procedure for installation.
It also enables the use of a torque wrench and a socket ensuring there is no occurrence of sealing failure as the gasket is compressed to the needed torque.
Ease & Speed of Installation
The installation of a flange adaptor can be done with a torque wrench and a spanner. Moreover, the dismantling joints are supplied with tensile strength tie bars that make the installation process. These ties bars act as flange jointing bolts that reduces the number of flange bolts needed.
Applications of Flange Adaptors
The use of flange adaptors helps in simplifying the installation and removal of the following -
Pump stations, sewage treatment plants, water treatment plants and other more applications use flange adaptors.
Key Installation Tips
Flange adaptors are utilized for field installations of standard threaded pipe flanges when the latter are resulting to be impractical due to cost and/or time restraints. Also, the set screws are an integral part of the adaptor to prevent blow-off and to offer restraint. The set screws need to be tightened to 70 ft. lbs torque.
Also, it needs to be kept in mind that the flange adaptors cannot be installed face to face.
If you are interested to know more about flange adaptors then make sure to pay a visit at this year&#;s WETEX event where Dutco Tennant LLC will be exhibiting.
Are you interested in learning more about Ductile Iron Flange Adapter? Contact us today to secure an expert consultation!