PIPE ENDS
PIPE JOINT DETAILS
1.Welded Joint
2.Spigot and Socket Joints
3.Spherical Socket Joint
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COMPARISON OF PIPE END JOINTS |
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Bevel Ended Pipe |
Spigot Socket Ended Pipe |
Spherical Socket Ended Pipe |
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Pipe Usage |
Gas/petroleum pipelines, water pipelines |
Water pipelines only |
Water pipelines only |
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Welding Type |
Butt welding |
Fillet welding, can be eighter from inside or outside |
Fillet welding, can be eighter from inside or outside |
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Pipe End Bevel Angle |
Depends on the specification, in general 30 degress, Squareness is very important |
No angle, perpendicular Squareness is not important |
No angle, perpendicular Squareness is not important |
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Welding Efficiency |
100% |
Not full penetration |
Not full penetration |
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Withstand To High Pressures |
Very good |
Poor |
Poor |
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Fluid Flow Capability |
Very good |
Poor |
Poor |
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Application At Site |
Difficult to fit-up and weld, needs special equipments, experienced and certified welders, more workmanship |
Easy to fit-up and weld, no need for experienced and certified welders, Less workmanship |
Easy to fit-up and weld, no need for experienced and certified welders, Less workmanship |
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Control After Welding |
Needs Non-Destructive Inspection, Radiography or Ultrasonic |
No need for special destructive Inspection, only visual inspection is enough |
No need for special destructive Inspection, only visual inspection is enough |
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Capability of Turning |
No bending, straight. Special fittings needed for the bends or special equipments are needed to bend the pipe. |
Pipes can be turned with a maximum of 2-3 degrees |
Pipes can be turned up to 6 degrees. No need for bends. |
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Joint Cost in Total |
Relativity high |
Less |
Less |