FNS Supply LLC Request a quote

Exceptional price · American quality

We make the parts that go inside the vessel.

Perforated risers, tubesheet assemblies, support plates, mesh pads, vane packs, cyclonics, strainers, cartridge carriers, davits and quick-open closures — engineered to order and fabricated in Mineral Wells, Texas.

A stainless tubesheet face with several hundred drilled tube holes, staged outdoors at a refinery.
PartTubesheet assembly Matl300-series SS ShopMineral Wells, TX

Spec 01 · Perforation

Every riser is drilled to a number.

Open area is the number that decides whether a riser passes flow or chokes it. We drill 23% to 58% on 60° staggered pitch. Move the slider and watch the plate change.

Open area
37.0 %
Hole Ø
0.319 in
Pitch, c–c
0.500 in
Pattern
60° staggered
Holes / ft²
665

Open area on triangular pitch = (π ⁄ 2√3)(d ⁄ p)². Shown at a fixed 0.500″ pitch; in production the pitch moves too. Tell us the flow and the pressure drop you have to hit and we will size it.

Diameters
0.385″ thru 11.90″
Material
Carbon & 300-grade stainless
Gauge
22ga to 10ga
Ends
Welded & threaded

Scope of supply

What we make

Eleven lines, one shop, one point of contact. Most of it ships engineered to order against your drawing or ours.

  • Vessel sizing & design assistanceBring the service conditions; we will work the internals back from them.
  • Risers & componentsPerforated, welded or threaded, 0.385″ thru 11.90″.
  • Tubesheet assembliesDrilled, rolled and welded bundles, carbon or stainless.
  • Support platesDrilled and profiled to the vessel ID.
  • Mesh padsKnitted mesh on grid, sized to the separation duty.
  • Vane packsConventional, single pocket and double pocket. Square, round, custom.
  • CyclonicsSingle tubes through full multicyclone bundles.
  • StrainersBasket, tee and custom fabricated.
  • Cartridge carriersCoalescer and filter carriers on drilled plate.
  • DavitsSized for the closure and the head you are opening.
  • Quick-open closuresGD Bandlock 2, 6″ thru 120″ nominal.

Product 01

Custom perforated tubes & risers

Welded and threaded risers in carbon and 300-grade stainless, drilled to your open area and cut to your length. We hold the tooling for the small diameters most shops turn down.

MatlCarbon & 300-grade SS Dia0.385″ – 11.90″ Open23% – 58% Ga22ga – 10ga EndsWelded / threaded
Perforated carbon-steel risers standing in a drilled support plate.
Finished stainless perforated risers stacked on the shop floor.
A full array of threaded risers set into a tubesheet.

Product 02 · Side by side

Vane packs, and what a cheap one costs you

Both of these are vane packs. One of them was built to a price. Hover the markers on the left.

A competitor vane pack with visibly uneven vane spacing, pinched flow hooks and thin sheet.
Competitor Built to a price
An FNS vane pack with even spacing, open drainage hooks and heavy-gauge stainless vanes.
FNS Supply Built to the drawing
Material
Typically 304 or 316 SS
Styles
Conventional · single pocket · double pocket
Profiles
Square, round & custom
Sizing
Custom per client needs

Product 03

Custom assemblies

Where the internals stop being parts and start being one weldment that has to drop into a vessel on a turnaround clock.

A completed tubesheet bundle crated on dunnage, tubes rolled into the sheet.
Tubesheet bundles
A fabricated stainless inlet device with vaned outlet.
Inlet devices
A carrier of coalescer cartridges assembled on a drilled plate.
Cartridge carriers
A round mesh pad on grid, banded for shipment.
Mesh & vane assemblies
A large carbon-steel tubesheet with rolled tube ends and a central open window.
Support plates & tubesheets
  • Carbon bed piping
  • Multicyclone bundles
  • Tubesheet bundles
  • Custom strainers
  • Mesh / vane assemblies
  • Inlet devices
  • and much more

Product 04 · GD Bandlock 2

Quick-open closures, including the big ones

The original internal-door locking band — the 1985 patent — in horizontal and vertical orientation. We specialise in large diameter, and we do not stop at the purchase order: FNS services closures, trains your crew in the office and in the shop, and supports installation and hydrotest.

Size6″ – 120″ nominal RatingASME 150# – 2500# and above Matl316 SS · Inconel 625 weld overlay · to spec OrientHorizontal & vertical SafetyInterlock systems available
A large-diameter quick-open closure installed on a horizontal vessel with access platform.
A technician swinging open a Bandlock 2 door in the field.
Cutaway render of the internal-door locking band mechanism.

Product 05 · ASME code shop

Filter housings, 24″ and down

A code shop dedicated to small vessels — filtration & separation, instrumentation and heat exchange. Two families, and the honest difference between them.

The filter housing range: clamp-style and ASME-style filters, a glycol still column and a heat-exchange coil.
Filter housing families compared
Attribute 1S / 1U
Clamp style
1SY / 1UY
ASME style
CodeNon-codeU-stamp or non-code
PressureUp to 2,000 PSIUp to 3,000 PSI
ClosureClamp4-bolt flange
MaterialCarbon steel / 316 SSCarbon steel / 316 SS
Diameter24″ and down24″ and down

On-site coalescer testing kits ship with the housings — so the element gets proven in your service, not on a datasheet.

Mineral Wells, Texas

40,000 sq ft
and still pouring slab

Buildings 1 and 2 on one site, Building 3 on another, and 40,000 square feet of expansion between them. Everything on this page is made here — which is why "American quality" is a fact on our shop floor and not a line in a brochure.

Expansion
40,000sq ft
Buildings
3on two sites
Code shop
24″and down
Stamp
Uor non-code

Request a quote

Send us the conditions.
We will send back a number.

A drawing is ideal. A napkin sketch and a service description is enough to start. The more of this we have, the tighter the quote comes back.

  • Service & fluid — what is being separated from what
  • Flow rate and operating pressure / temperature
  • MAWP and design temperature, if the vessel is coded
  • Vessel ID, or the closure nominal size
  • Materials of construction
  • Code requirement — U-stamp or non-code
  • Quantity and need-by date
Phone713-425-6796 EmailSales@FNSSupply.com Shop908 Hood Road
Mineral Wells, TX 76067

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