Name: Daisey Guo
Add: No.1518, First Jinyuan Rd., Jiangqiao Industrial Zone, Jiading District, Shanghai, China
Skype: Estan pipe fittings
Pipe Fitting Selection Guide
|AUTHOR : _ _ Date : 4/18/2013 11:35:56 PM|
Pipe fittings are available in various shapes, sizes and materials. Used to connect pipes of different lengths
and sizes, these pipe fittings and flanges should make the right connections. Pipe and pipe-fittings are
produced from a various materials for the transport of wide variety of solids and fluids. The wrong pipe
fitting can lead to many problems like:
• Some popular fitting types
1. Threaded Pipe Fittings:
These are the most commonly used fittings based on certain standards. For instance, there are threaded fittings of pipes in BSP (British Standard Pipe), NPT (National Pipe Taper), UNF (Unified Fine Thread) sizes
for permanent, high-pressure pipe connections.
2. Socket Weld Fittings:
A socket weld fitting is unthreaded, but has large sockets at both ends to accept a pipe end. The fitting is
then permanently welded to the pipe.
3. Butt Weld Fittings:
Buttweld (BW) fittings whose dimensions, dimensional tolerances et cetera are defined in the ASME B16.9 standards. Light-weight corrosion resistant fittings are made to MSS SP43.
A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It
also provides easy access for cleaning, inspection or modification.
• Pipe Thread Sizes
This is a very important consideration for any pipe fitting. All pipes were manufactured with specification of a standardized outside diameter (OD) and wall thickness which in turn implies that the nominal pipe size is approximately equal to the inside diameter (ID). Nowadays, various thread configurations are used. We give below an example of British Standard Pipe (BSP) fittings for connecting systems that use both NPT and BSP thread configurations. The table shows a comparison of these two thread styles.
• To sum up: Selection criteria for buyers
2. Pressure Ratings
3. Design and operation
4. Safety information
5. Temperaturepipe fittings and flanges, certain questions need to be answered for that particular pipe fitting and the manufacturer who is manufacturing that particular fitting. Some of these questions are as follows:
• Buyer's assistance
1. Can it handle pressure?
2. Can it handle high temperature?
3. Does it have proven long-term performance?
4. Are the joints or seals reliable?
5. Can it be fitted properly?
6. Does it have confidence of manufacturers?
7. Can it withstand outdoor storage and ultraviolet rays?
8. Can it resist punctures and abrasion?
9. Does it have widespread approval and acceptance from inspectors and engineers?
10. Does it have quality and value?The more the number of “YES”, the better is your product.
The more the number of “YES”, the better is your product.
• Check all kinds of pipe fittings
45 degree elbow
45D CS butt weld elbow 45D SS butt weld elbow 45D socket weld elbow 45D threaded elbow
90 degree elbow
90D CS butt weld elbow 90D SS butt weld elbow 90D socket weld elbow 90D threaded elbow street elbow
180 degree elbow
180D CS butt weld elbow 180D SS butt weld elbow
CS butt weld straight tee CS butt weld reducing tee SS butt weld straight tee SS butt weld reducing tee socket weld tee threaded tee
CS butt weld lateral tee SS butt weld lateral tee socket weld lateral tee threaded lateral tee
CS butt weld straight cross CS butt weld reducing cross SS butt weld straight cross SS butt weld reducing cross socket weld cross threaded cross
CS concentric reducer CS eccentric reducer SS concentric reducer SS eccentric reducer
CS butt weld cap SS butt weld cap socket weld cap threaded cap
6. Stub end:
CS stub end SS stub end
socket weld full coupling socket weld half coupling threaded full coupling threaded half coupling
socket weld union threaded union
9. Socket insert:
hex head plug square head plug round head plug
hex head bushing flush bushing
TBE PBE TOE&POE hex nipple
13. Swaged nipple:
concentric swage nipple eccentric swage nipple
Orifice flange lap joint flange threaded flange socket weld flange weld neck flange blind flange slip on flange long weld neck flange plate flange large diameter flange spectacle blind square flange
weldolet socketolet threadolet laterolet coupolet elolet nipoflange nipolet
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