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Molecular Seals

Oil & gas · Flare systems

Molecular Seals

The seal in a flare stack that stops air creeping down into the stack: an outer shell with an inverted inner cone, flanged into the stack, fabricated to the licensor’s drawing.

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Allmarc 3D model · to scale

Explore the model

How it is built.

Scroll: the camera moves to each part in turn and ends on the exploded view. Drag to turn it round yourself.

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Inside the seal

Cut open to show how it works: purge gas collects under the outer head and the inverted cone keeps air from getting down the stack.

Scroll to see how it is built · drag to turn it round

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Shell and heads

The outer shell and conical heads, rolled and welded, with stiffener rings.

How is it possible at Allmarc?

Three-roll pinch cum pyramid plate rolls in the Allmarc works

Used here for: Shell and heads

Rolls plate up to 40 mm

All our machinery

Used here for: Shell and heads

In 2024 we were the only buyer of Deratech’s 20 kW, 12 m laser.

20 kW
12 x 3 m bed
Pallet changer

All our machinery

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The baffle

The inner tube and inverted cone: the part that makes it a seal. Fit-up is checked before the shell is closed round it.

How is it possible at Allmarc?

Deratech Ultima Hybrid 600 T press brake in the Allmarc works

Used here for: The baffle

600 T
6 m long
Bends 12 mm plate

All our machinery

Used here for: The baffle

Qualified welders, including 6G

All our machinery

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Flanged into the stack

Flanges machined flat so the seal bolts into the stack without leaks.

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Nozzles, manway, lugs

Drain and instrument nozzles, a manway, and lugs for the lift.

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Part of the stack

See Elevated Flare Stacks for the stack itself.

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A kit of parts

Shell, baffle, flanges and nozzles: every member numbered, match-marked and packed in erection sequence.

Why Allmarc

Experience you can trust.

We fabricate to your drawings and prove the fit in our own bay before anything ships. Open any line for the detail.

Talk to an engineer

Fabricated to your drawings

We build to the licensor’s design.
We do not compete with the people who send us work.

Proven before it ships

Trial-assembled in our bay.
Fit-up is settled in Ahmedabad, not on site.

Plate to packed container

Procurement, rolling, welding and NDT, coating, insulation.
Export packing designed for the journey.

Scale

Made in Unit 2, our precision plant for oil and gas; 4 plants at Kanbha, about 6,000 T a month from November 2026.
2,400 tonnes of flare equipment exported to date.