Straight Double Flanged Pipe
A straight barrel joins two aligned flanged components. Moreover, the drawing controls its exact face-to-face length.
Two-ended flanged pipe sections made to approved drawings
Double Flanged Pipe Manufacturer in India
Mesta Inc. manufactures double flanged pipe sections with controlled face-to-face dimensions, flange alignment and bolt-hole orientation. Moreover, buyers can add a central puddle plate for concrete wall or tank penetrations.
Custom Pipe Section with Flanges on Both Ends
A double flanged pipe is a straight or drawing-defined pipe section with a bolted flange at each end. Consequently, installers can connect the piece between valves, equipment, pipelines or other flanged components without field welding at its ends.
The assembly may also include a central puddle plate when it passes through a concrete wall or tank. In that configuration, the plate acts as the embedded water stop, while the two end flanges provide separate bolted connections.
Mesta Inc. manufactures each double flange pipe to the approved drawing. Therefore, buyers should define the pipe size, face-to-face length, material, wall thickness, flange standard, pressure class, facing and bolt-hole orientation.
Two bolted endsA connection flange at each end supports installation between compatible flanged components.
Controlled face-to-face lengthThe approved drawing defines the distance between flange faces and the permitted tolerance.
Matched flange detailsBuyers specify standard, size, class, facing, drilling and orientation for both ends.
Optional puddle plateA central water-stop plate can support a concrete wall or tank penetration when required.
Double Flanged Pipe Specifications
The term “double flanged pipe” defines the general configuration but not the finished dimensions or rating. Therefore, the purchase specification should include every item below.
| Nominal pipe size | Project-defined size together with the governing pipe and flange dimensional standards. |
|---|---|
| Pipe material | Carbon steel, stainless steel, alloy steel or another approved material and grade. |
| Pipe wall | Schedule or project-defined wall thickness according to size, material and service. |
| Face-to-face length | Distance between the two finished flange faces, with stated tolerance. |
| Flange standard | Project-specified dimensional standard for each end flange. |
| Pressure designation | Required class or pressure rating for the flanged connection system. |
| Flange facing | Flat face, raised face, ring-type joint or another specified facing as applicable. |
| Bolt-hole orientation | Straddle centreline or drawing-defined clocking for both flanges. |
| Optional puddle plate | Plate OD or width, thickness, position and material for wall-penetration assemblies. |
| Inspection and testing | Visual, dimensional, NDT, pressure testing, coating inspection and documentation as specified. |
Length note: State whether the required length is face-to-face, overall, flange-to-centreline or another drawing dimension. Otherwise, different interpretations can produce an unusable pipe piece.
Double Flanged Pipe Configurations
The piping layout and installation method determine the flange and pipe arrangement. Consequently, buyers can define one of several configurations.
Double Flanged Wall Pipe
An extended pipe section crosses a wall or chamber while its end flanges remain accessible on both sides.
Double Flanged Pipe with Puddle
A central puddle plate creates the embedded water stop for an RCC wall, slab or tank penetration.
Reducing or Fitting Assembly
A drawing may add a reducer, elbow or branch between the flanged ends when the piping design requires it.
Compare our single flanged pipe, flange-spigot pipe with puddle and puddle flange pipe pages.
Flange Details Required at Both Pipe Ends
Two flanges do not have to be identical, although many assemblies use matching ends. Therefore, specify each end independently:
- Flange standard: identify the dimensional standard and applicable edition.
- Size and rating: state the nominal size and pressure designation for End A and End B.
- Facing: define flat face, raised face, RTJ or another approved surface.
- Drilling: confirm bolt-circle, hole quantity and hole diameter through the selected standard.
- Orientation: state bolt-hole clocking, especially when both ends must match fixed equipment.
- Dissimilar ends: identify any difference in size, class, facing or material between the two flanges.
Rating note: The flange class applies to the connection system, not automatically to every part of a wall-penetration assembly. The piping designer must confirm the complete pressure design.
Double Flanged Pipe Manufacturing Process
A controlled fabrication sequence connects material traceability with face-to-face and flange-orientation accuracy.
Review the Drawing
First, confirm pipe data, face-to-face length, both flange details and any puddle plate.
Verify Materials
Next, match the pipe, flanges and plate with the approved bill of materials.
Cut and Prepare
Then, cut the pipe and prepare the flange weld ends according to the fabrication documents.
Fit and Clock Flanges
Fabricators establish face-to-face length, flange parallelism and bolt-hole orientation before welding.
Weld and Examine
Afterwards, qualified personnel complete welding and the specified visual or non-destructive examinations.
Test and Release
Finally, inspectors complete dimensional checks, testing, finishing, marking and documentation.
Double Flanged Pipe Quality Control
The inspection plan should address both pressure-boundary quality and installation dimensions. Accordingly, typical checks include:
Material Traceability
First, markings and certificates connect the pipe, both flanges and optional plate to the BOM.
Flange Alignment
Inspectors check face parallelism, concentricity, facing condition and bolt-hole orientation.
Weld Examination
The team performs visual and specified PT, MT, RT, UT or other examination as applicable.
Pressure and Coating Checks
Finally, inspectors complete specified pressure testing and surface-finish verification.
Double Flanged Pipe Applications
Projects use double flanged pipe sections where installers need removable bolted connections at both ends. For example, common applications include:
- Valve and flow-meter installation sections
- Pump suction and discharge connections
- Water and wastewater treatment plants
- RCC tank and chamber wall penetrations
- Fire-water and utility piping
- Equipment nozzle and skid connections
- Removable maintenance or replacement pieces
Additionally, wall-penetration projects can review concrete-wall puddle flanges, water-tank penetrations and CS water tank puddle flanges.
Details Required for a Double Flanged Pipe Quote
For accurate fabrication and pricing, send the approved drawing and these details:
- Pipe size, material grade and wall thickness or schedule
- Required face-to-face length and tolerance
- End A flange standard, size, class, facing and material
- End B flange standard, size, class, facing and material
- Bolt-hole orientation and flange clocking
- Optional puddle plate material, OD, thickness and position
- Applicable piping or construction code
- Welding, NDT and pressure-testing requirements
- Surface preparation, coating, lining or passivation
- Quantity, documentation, packing and delivery schedule
Double Flanged Pipe Frequently Asked Questions
What is a double flanged pipe?
It is a pipe section with a bolted flange at each end. Consequently, installers can connect it between compatible flanged components without field-welding its ends.
Can the two end flanges have different ratings?
Yes, when the approved design requires dissimilar ends. However, the purchaser must specify each flange standard, class, facing and material separately.
What does face-to-face length mean?
It is the finished distance between the two flange faces. Therefore, buyers should state the required length and tolerance clearly.
Can a double flanged pipe include a puddle flange?
Yes. A central puddle plate can create a water stop where the pipe passes through concrete, while the two end flanges provide bolted connections.
Why does bolt-hole orientation matter?
Correct orientation allows both flanges to align with fixed mating connections. Otherwise, installers may face misalignment at site.
Which materials can buyers specify?
Depending on the project, options can include carbon steel, stainless steel, alloy steel or other approved materials.
What should I send for a quote?
First, send the drawing, pipe material and face-to-face length. Then, provide full details for both flanges, welding, testing, coating and quantity.
Request a Double Flanged Pipe Quote
Send Mesta Inc. your pipe dimensions, puddle plate details, material, drawing, quantity, inspection scope and delivery requirements. Then, our team will review the enquiry and confirm the appropriate manufacturing scope.