PIPE JOINTS THE WORLDChinajsgj
CONTACT
Home > FAQ > Application of flanges and pipe fittings >

Advantages and Disadvantages of Socket Weld fittings

Advantages and Disadvantages of Socket Weld fittings
Update Time:2019-12-11
Advantages and Disadvantages of Socket Weld fittings
Socket welding tees
ADVANTAGES
1. The pipe need not be beveled for weld preparation.

2. Temporary tack welding is no needed for alignment, because in principle the fitting ensures proper alignment.

3. The weld metal can not penetrate into the bore of the pipe.

4. They can be used in place of threaded fittings, so the risk of leakage is much smaller.

5. Radiography is not practical on the fillet weld; therefore correct fitting and welding is crucial. The fillet weld may be inspected by surface examination, magnetic particle (MP), or liquid penetrant (PT) examination methods.

6. Construction costs are lower than with butt-welded joints due to the lack of exacting fit-up requirements and elimination of special machining for butt weld end preparation.

connection of socket welding fittings and pipe
DISADVANTAGES
1. The welder should ensure for a expansion gap of 1/16 inch (1.6 mm) between de pipe and the shoulder of the socket.
ASME B31.1 para. 127.3 Preparation for Welding (E) Socket Weld Assembly says:
In assembly of the joint before welding, the pipe or tube shall be inserted into the socket to the maximum depth and then withdrawn approximately 1/16" (1.6 mm) away from contact between the end of the pipe and the shoulder of the socket.

2. The expansion gap and internal crevices left in socket welded systems promotes corrosion and make them less suitable for corrosive or radioactive applications where solids buildup at the joints may cause operating or maintenance problems. Generally require butt welds in all pipe sizes with complete weld penetration to the inside of the piping.

3. Socket welding are unacceptable for UltraHigh Hydrostatic Pressure (UHP) in Food Industry application since they do not permit full penetration and leave overlaps and crevices that are very difficult to clean, creating virtual leaks.
The purpose for the bottoming clearance in a Socket Weld is usually to reduce the residual stress at the root of the weld that could occur during solidification of the weld metal, and to allow for differential expansion of the mating elements.
Become A JS FITTINGS Customer
Please send your message to us
STEEL FITTINGS FOR PIPE CONNECTION

The professional manufacturing capacity of JS FITTINGS strongly guarantee the high-quality products, competitive price and short delivery time.

  •  Free samples can be supplied. Customers need to pay for the courier cost, which will be returned in the following orders.
  •  All your inquiries will be replied in 2 hours and quotations will be supplied within 24 hours.
  • Once  the deposit is received during the contract valid time ,  JS FITTINGS will take full responsibility and obligation for accomplishment of the Contract.
  • The urgent order with 100% prepayment has the priority of delivery.
Please send your message to us
*Email
Name
Tel
*Title
*Content

Agree to use terms of service

Upload
    Address