Why is reinforcement pad required?
Why is the reinforcement pad required? RePADs or RF Pads are plates used to reinforce components and/or nozzles by increasing thickness local to the component in high stressed zones. These are made from the same size and material as the pipe header to which they are welded.
What is the purpose of a Repad?
The quick and dirty answer is that a repad is a reinforcing pad. As you may have guessed from the name, a repad is used to reinforce or strengthen a high-stress point on your pipe. The product itself looks like a doughnut or a big washer.
How do you make reinforcement pads?
To create a reinforcement pad
- If plantwelddisplay is off, in the ribbon, in the Visibility pane, toggle weld display on.
- Click on a weld dot in the drawing to select it.
- Click on the substitution grip.
- In the shortcut menu, click Reinforcement Options Add Reinforcing Pad.
Why there is a need for providing compensation ring reinforcement pad around the nozzle?
To compensate for the weakening of the nozzle in the wall of the pressure vessel, a reinforcing pad must often be provided around the nozzle neck.
How is reinforcement pad thickness calculated?
Dimensions Reinforcing Pad Material = same material as the run pipe. Width = half a diameter of the branch pipe (at least 50 mm) Thickness = same thickness as the run pipe, with a min. of 3 mm and a max.
What is purpose of providing self-reinforced nozzles?
Basically, in operations of heavy pressure, a self-reinforced nozzle head cuts out the burden of reinforcing the nozzle or piping with additional plating or added forgings, making for a more cost-effective yet structurally sound solution.
What is purpose of weep hole in reinforcing pad?
Weep holes serves as a vent during welding for entrapped gasses and prevents the Reinforcing Pad from becoming a “jacketed” vessel. Weep holes in Reinforcing Pads shall be sealed upon completion of pressure test.
What is reinforcement in piping?
Pipe Reinforcement Sealxpert > Pipe Reinforcement. Pipelines form the basis for the fluid transportation in all industries, starting from drinking water to corrosive, toxic and hazardous chemicals and gases. As pipeline deteriorates due to corrosion, erosion, etc., the pipe wall thickness will be reduced.
How are reinforcement pad dimensions calculated?
Dimensions Reinforcing Pad
- Material = same material as the run pipe.
- Width = half a diameter of the branch pipe (at least 50 mm)
- Thickness = same thickness as the run pipe, with a min. of 3 mm and a max. of 20 mm.
What is tell tale in pressure vessel?
Telltale holes are holes in the outside of the vessel structure that do not penetrate the wall thickness. They are used for example in reinforcement pads around nozzles to detect defects in the nozzle to shell welds. When the weld is defect, the “hole will tell”.
What is integrally reinforced nozzle?
Basically a integrally reinforced nozzle is one where sufficient reinforcement for the opening exists in the host wall and in the neck of the nozzle. No reinforcing pads are added.
How big is a vent hole on a reinforcement pad?
Vent holes are also known as weep holes or Telltale holes. The normal size of the weep hole is 6 mm. If the reinforcement pad is made of multiple pipe cuts, then a vent hole should be provided in each cut piece.
What does a weep hole in a repad do?
I agree with jte. The weep hole in a repad serves two purposes; to allow for entrapped gas to escape during welding of the repad to the vessel wall and to detect any leakage of vessel contents during service.
Can a weep hole be plugged with insulation?
Having insulation cover a weep hole is not a problem because should a leak develop between the repad weld and the shell/nozzle attachment weld, you will know. Do not place any fittings on the weep hole or plug weld the weep hole!! Weep holes exposed to outside weather conditions are often plugged with caulking.
How is a reinforcing pad attached to a pipe?
The reinforcing pad is a ring cut from a steel plate that has a hole in the center equal to the outside diameter of the branch connection. It is slipped onto the branch pipe before the branch pipe is welded to the header. Once the branch has been welded to the header, the reinforcing pad is slid down the branch to cover the weld connection.