TECTULby IMR
Custom-fabricated wall sleeves (pasamuros) in carbon and stainless steel — specification and dimensions
TECTUL · Dispatch across Colombia · Exports to Central & South America
A TECTUL wall sleeve (pasamuro) is a length of steel pipe (outside diameter per ASME B36.10M) with a welded water-stop ring, cast into the concrete wall or slab so a pipe can pass through without seepage. It is made in-house to order and defined by 6 data — diameter, length (wall thickness), end type on each side, ring, and material with finish.
Important: Before using these data in engineering, design or installation decisions on systems exposed to mechanical, pressure, rupture, fatigue, impact or water-hammer risk, it is essential to read the technical notice and limitation of liability at the end of this sheet.
SKU VT-155515 (carbon steel wall sleeve, flanged ends) · family of 23 made-in-house references (20 metallic, 1 tank type, 2 PVC)
1. Technical specifications: anatomy and combination matrix
Anatomy of the wall sleeve
A TECTUL wall sleeve (pasamuro) consists of three elements, all fabricated in-house:
| Body | Length of steel pipe with outside diameter per ASME B36.10M (table below), cut to the ordered length — in made-to-order fabrication the length equals the thickness of the wall or slab it crosses. Standard length published online: 60 cm. |
| Water-stop ring (puddle flange) | Steel ring welded around the body, embedded in the concrete, that interrupts the water path along the pipe-concrete interface (mechanism in section 3). Standard position: centered on the length; a different position or diameter is stated in the order. |
| Ends | Each end is finished in one of 4 types: plain (for field welding or for using the sleeve as a pass-through casing), threaded NPT per ASME B1.20.1, grooved for mechanical couplings per ANSI/AWWA C606, or flanged with a welded flange per ASME B16.5. The two ends are chosen independently: the matrix below lists the 10 cataloged combinations. |
Body outside diameter (ASME B36.10M)
| NPS | DN | Outside diameter (mm) | Outside diameter (in) |
|---|---|---|---|
| 2″ | 50 | 60.3 | 2.375 |
| 3″ | 80 | 88.9 | 3.500 |
| 4″ | 100 | 114.3 | 4.500 |
| 6″ | 150 | 168.3 | 6.625 |
| 8″ | 200 | 219.1 | 8.625 |
| 10″ | 250 | 273.0 | 10.750 |
| 12″ | 300 | 323.8 | 12.750 |
IMPORTANT
This data sheet is a reference guide to the properties of this product type. The measurements, dimensions and physical or geometric characteristics of the product actually supplied may vary by manufacturer and lot, and may even fall outside the cited standards. If any of these figures is critical to your design or build, it is essential to verify it with one of our advisors against the physical product, so you can be fully certain of what you are buying. · Original data sheet: tectul.com/en/conduccion-de-fluidos/accesorios-de-tuberia/ficha-tecnica-pasamuro-acero-al-carbon-extremos-bridados.html
The nominal size (NPS) of the sleeve is that of the line being connected, or of the pipe passing through it. The wall thickness (schedule) of the body is assigned by the shop according to size and service and is confirmed on quotation.
Matrix of the 10 cataloged end combinations
Each end combination exists as its own catalog reference in carbon steel and in stainless steel — 20 metallic references in total:
| # | End, side A | End, side B | Carbon steel | Stainless steel |
|---|---|---|---|---|
| Published sizes | Published sizes | |||
| 1 | Plain | Plain | 2″–6″ | 2″–12″ |
| 2 | Threaded NPT | Threaded NPT | 2″–6″ | 2″–6″ |
| 3 | Grooved | Grooved | 2″–12″ | 2″–12″ |
| 4 | Flanged | Flanged | 2″–12″ | 2″–12″ |
| 5 | Threaded NPT | Plain | 2″–6″ | 2″–6″ |
| 6 | Flanged | Plain | 2″–12″ | 2″–12″ |
| 7 | Flanged | Threaded NPT | 2″–6″ | 2″–6″ |
| 8 | Grooved | Plain | 2″–12″ | 2″–12″ |
| 9 | Grooved | Flanged | 2″–12″ | 2″–12″ |
| 10 | Grooved | Threaded NPT | 2″–6″ | 2″–6″ |
IMPORTANT
This data sheet is a reference guide to the properties of this product type. The measurements, dimensions and physical or geometric characteristics of the product actually supplied may vary by manufacturer and lot, and may even fall outside the cited standards. If any of these figures is critical to your design or build, it is essential to verify it with one of our advisors against the physical product, so you can be fully certain of what you are buying. · Original data sheet: tectul.com/en/conduccion-de-fluidos/accesorios-de-tuberia/ficha-tecnica-pasamuro-acero-al-carbon-extremos-bridados.html
Published sizes: 2″, 3″, 4″ and 6″ in every combination, plus 8″, 10″ and 12″ as per the table. Combinations with at least one threaded NPT end are published up to 6″. Sizes or lengths outside the published range are quoted as made-to-order fabrication.
Materials and finishes
| Carbon steel | Body in ASTM A53 / A106 carbon steel pipe (per size and schedule); the body material properties are in the catalog's schedule 40 carbon steel pipe data sheet (FT-TC-TUB-SCH40-001). Finishes to order: black (uncoated), epoxy paint, hot-dip galvanizing and mortar coating; the system and thickness of each finish are defined on quotation. |
| Stainless steel | Body in ASTM A312 austenitic stainless steel pipe; material properties in the catalog's stainless pipe data sheet (FT-TC-TUB-INOX-001). Supplied uncoated; the lot grade (TP304 / TP316) is confirmed on quotation. |
| PVC | Two references for service penetrations with no metallic requirement: plain PVC sleeve (2″–4″) and threaded PVC sleeve (1/2″–2″); configuration per their product pages. |
General specifications
| Product | Family of 23 made-in-house references: 20 metallic (the 10 end combinations in carbon and in stainless steel), 1 stainless tank sleeve (section 4) and 2 PVC sleeves. |
| Function | Passing pipe or conduits through walls, slabs and tank shells without water seepage along the concrete-pipe interface. |
| Size range | 2″ to 12″ metallic (published); 1/2″ to 4″ in PVC. |
| Length | 60 cm standard published; made to order, equal to the wall or slab thickness (datum 2 of the specification sheet). |
| Reference standards | ASME B36.10M (body outside diameter) · ASME B1.20.1 (threaded NPT ends) · ANSI/AWWA C606 (grooved ends) · ASME B16.5 (flanged ends) · body materials per the linked pipe data sheets. |
⚠ Important: this technical data sheet is a reference guide to the product's properties; it is not a quality certificate for the product you are buying. Heats vary from one another and may differ from the values stated here, or even depart from the standards. If your application requires compliance with a standard, always check the quality certificate (mill certificate) of the lot you are buying. If in doubt, ask one of our technical advisors →
2. Specification sheet: the 6 data that define a wall sleeve
A wall sleeve is not calculated: it is specified. It is in-house fabrication to order, so there is no catalog table covering every wall — there is a specification sheet. These 6 data completely define any sleeve from the shop; with them the quotation comes out with no back-and-forth:
| # | Datum | How to determine it |
|---|---|---|
| 1 | NPS of the passing pipe | The NPS of the line connecting to the sleeve — or, if the sleeve works as a casing, that of the pipe running through it plus the annular seal clearance. It sets the body outside diameter (table in section 1). |
| 2 | Length L = wall thickness | In millimeters, equal to the wall or slab thickness so the sleeve sits flush with both faces. If the project requires the sleeve to protrude (for instance, to reach a flange or coupling outside the wall), state the projection per face. Standard published length: 60 cm. |
| 3 | End, side A | Plain, threaded NPT, grooved or flanged, per the line's joining system on that face. It helps to identify in the order which side is A (for example, the exterior or wet face of the wall). |
| 4 | End, side B | The same menu of 4 types, chosen independently — the 10 cataloged combinations are in the section 1 matrix. |
| 5 | Water-stop ring: position and diameter | Standard position: centered on the length (L/2 from each face). If the project detail calls for something else, state the distance from the ring to the reference face. The ring outside diameter may be stated or left to the shop standard (confirmed in the quotation). |
| 6 | Material and finish | Carbon steel (black, epoxy, hot-dip galvanized or mortar), stainless steel (uncoated) or PVC in its references. |
CARBON STEEL WALL SLEEVE · NPS 4″ (OD 114.3 mm) · L = 300 mm (30 cm wall) · SIDE A (wet face): FLANGED · SIDE B: GROOVED · RING: CENTERED, SHOP-STANDARD DIA. · FINISH: EPOXY PAINT · QTY: 6 PCS
- Datum 1 → body with 114.3 mm outside diameter (B36.10M table, section 1).
- Datum 2 → body cut to 300 mm: the sleeve sits flush with both faces of the 30 cm wall.
- Data 3 and 4 → combination #9 of the matrix (grooved × flanged), published from 2″ to 12″ in carbon steel.
- Datum 5 → ring welded 150 mm from each face, shop-standard diameter confirmed in the quotation.
- Datum 6 → carbon steel with epoxy paint; system and thickness defined on quotation.
If any of the 6 data is missing from the order, the shop applies its standard (centered ring, standard ring diameter and schedule) and states it explicitly in the quotation before fabricating. Nothing is fabricated on assumed data.
3. The water-stop ring: why it blocks seepage
Water does not cross the steel or sound concrete: it migrates along the annular interface between the pipe and the concrete, a continuous capillary path that forms because concrete does not bond watertight to the smooth pipe surface. Without a ring, that path is a straight line the length of the wall.
The water-stop ring — a perpendicular ring welded to the body — works through three mechanisms, concordant across the technical literature of puddle flange manufacturers:
- It interrupts the capillary path: it is a mechanical barrier inside the concrete that cuts the continuity of the pipe-concrete interface.
- It lengthens the water's travel: to get through, water would have to move radially outward, go around the edge of the ring and come back to the pipe. That longer path reduces the hydraulic gradient at the interface — for the same water pressure, less seepage driving force per millimeter of travel.
- It anchors the concrete: the concrete sets against both faces of the ring and confines it; the assembly becomes monolithic and resists hydrostatic thrust without displacement.
The installation conditions follow from those mechanisms: the ring must be fully embedded in sound, vibrated concrete, with no voids under it — a casting void is a shortcut for water. That is why the sleeve is fixed to the formwork or the rebar before the pour.
Ring position: centered or offset
The shop's standard position is centered (L/2 from each face): it maximizes the concrete cover on both sides of the ring. It is fabricated offset when the project's construction detail requires it — for example, two-stage pours or details with toppings — stating in the order the distance from the ring to the reference face (datum 5 of the specification sheet).
Embedded in the pour vs installed in a drilled opening
| Sleeve embedded in the pour | The ring is confined in the fresh concrete: a monolithic joint, with no additional sealing elements at the interface. This is the solution in this sheet and requires coordinating the sleeve before casting. |
| Penetration executed later (core-drilled) | There is no embedded ring: watertightness depends on an additional seal at the hole-pipe joint (mechanical or elastomeric seal), which adds one more interface and its own maintenance. It is the alternative when the wall already exists. |
4. Wall sleeve vs tank sleeve
Besides the embedded sleeves, the catalog includes the stainless steel tank sleeve: a connection with a drilled flange bolted against the tank shell with an elastomeric gasket compressed between flange and wall. They are two products with opposite watertightness logics:
| Watertightness | Wall: by the water-stop ring embedded in the concrete (section 3) — a monolithic joint. · Tank: by gasket compression between the flange and the wall — a mechanical joint. |
| Installation | Wall: before the pour, fixed to the formwork or rebar. · Tank: over a drilled opening in the existing shell, bolted — no pour required. |
| Removability | Wall: not removable — embedded for the life of the structure. · Tank: removable — the gasket is replaced during maintenance. |
| When to use each | Wall: new or cast-in-place concrete structures with water against the wall face. · Tank: existing tanks (stainless, plastic, or with a shell that allows drilling and bolting) where embedding is not possible or not convenient. |
| Catalog reference | Stainless steel tank sleeve with threaded NPT connection (see its product page). The silicone sleeve gasket is a separate reference in 1/2″ to 4″ (maintenance spare). |
5. Frequently asked questions
What is a wall sleeve (pasamuro)?
A wall sleeve is a length of steel pipe with a welded water-stop ring, embedded in a concrete wall or slab so a pipe can cross it without water seepage along the pipe-concrete interface. The body has the outside diameter of standard pipe (ASME B36.10M) and each end is finished plain, threaded NPT, grooved or flanged per the line's joining system.
How is a wall sleeve specified?
With 6 data: (1) NPS of the passing pipe, (2) length equal to the wall thickness, (3) end type on side A, (4) end type on side B, (5) position and diameter of the water-stop ring, and (6) material with its finish. Section 2 of this sheet is the complete specification sheet, with an order example ready to forward with the purchase order.
Which end combination should I choose?
The one matching the line's joining system on each face of the wall: plain for field welding or for using the sleeve as a pass-through casing, threaded NPT for threaded lines (published up to 6″), grooved for ANSI/AWWA C606 mechanical couplings, and flanged for removable ASME B16.5 connections. The two sides are chosen separately — the 10 cataloged combinations, with their sizes, are in the section 1 matrix.
Why does the water-stop ring block water?
Because it interrupts and lengthens the capillary path water follows along the pipe-concrete interface: to get through, water would have to go around the ring, and that longer travel reduces the seepage hydraulic gradient. The concrete also sets against both faces of the ring and confines the sleeve monolithically. It must be fully embedded in vibrated concrete, with no voids (section 3).
What pressure does a wall sleeve take?
The line's working pressure is governed by the end joints (ASME B16.5 flange, NPT thread, grooved coupling), the system's pipe and the project design code — not by the ring, whose function is watertightness against water in the structure. The capacity of each fabricated configuration is confirmed with the quotation per project requirements.
What is the difference between a wall sleeve and a tank sleeve?
The wall type is embedded in the concrete pour and seals with the water-stop ring (not removable); the tank type is bolted against the existing shell with a drilled flange and an elastomeric gasket (removable, no pour). The full comparison is in section 4.
6. Application notes
Feasibility
The embedded metallic sleeve is the solution for crossing concrete in contact with water: basements, cast-in-place tanks, pits and pump rooms. Carbon steel with a finish (epoxy, hot-dip galvanizing or mortar) covers general service; stainless where the fluid or the environment demands it. The PVC references solve service penetrations with no metallic requirement. For existing tanks where embedding is not possible, the bolted tank sleeve with gasket (section 4) installs over a drilled opening with no new pour.
Installation
The embedded sleeve is installed before the pour: it is fixed to the formwork or the rebar at the drawing's position and plumb, each end is protected during the pour (threads, grooves and flange faces covered) and the concrete is vibrated around the ring so it is fully embedded, with no voids under it — watertightness depends on that contact (section 3). For the tank sleeve, the seating surface must be clean and flat before compressing the gasket.
Design
Two use modes that change the specification: as an embedded spool that is part of the line (threaded, grooved or flanged ends — the piping connects to the sleeve on each face) or as a pass-through casing (plain ends — the pipe runs through it and the annular space is sealed separately). In the first case the NPS is that of the line; in the second it is set by the passing pipe plus the annular seal. The line's working pressure is governed by the end joints and the rest of the system (ASME B16.5 flange, NPT thread, grooved coupling) together with the pipe — see the linked pipe data sheets for the body material.
7. Technical notice and limitation of liability
The sizes, lengths and combinations in this sheet are those published in the TECTUL catalog as of July 2026; the normative dimensions cited (ASME B36.10M outside diameter, ASME B1.20.1 thread, ANSI/AWWA C606 groove, ASME B16.5 flanges) are nominal values from the standards. They guide specification; they are not a certificate of conformity for any given lot.
Because this is in-house fabrication to order, the body schedule, the exact material grade, tolerances, welding process, testing and finish thicknesses are defined with each quotation according to project requirements, and the agreed documentation is delivered with the order.
These data must not be used as the sole criterion in critical or safety applications, or wherever seepage or line failure may compromise people, property or the environment: in such cases the wall-penetration detail belongs to the project's responsible engineer under the applicable code and specifications. Before deciding with these data, consult our technical team.
Sources
- ASME B36.10M-2018 — Welded and Seamless Wrought Steel Pipe (diámetros exteriores del cuerpo por NPS)
- ASME B16.5 — Pipe Flanges and Flanged Fittings, NPS 1/2 Through NPS 24 (extremos bridados)
- ASME B1.20.1-2013 (R2018) — Pipe Threads, General Purpose, Inch (extremos roscados NPT)
- ANSI/AWWA C606 — Grooved and Shouldered Joints (extremos ranurados)
- Fichas técnicas TECTUL de tubería: FT-TC-TUB-SCH40-001 (acero al carbón ASTM A53/A106) y FT-TC-TUB-INOX-001 (inoxidable ASTM A312) — propiedades del material del cuerpo
- Vixon Piping — «The Engineering Behind Puddle Flanges: How They Work» y «How Puddle Flanges Prevent Water Leakage in Concrete Structures» (consultadas jul 2026): mecanismo del aro de estanqueidad — barrera mecánica, interrupción del camino capilar y adherencia del hormigón (fuente concordante)
- EPCLand «What is a Puddle Flange?» y foro de ingeniería Eng-Tips (hilo «What exactly is a puddle flange?»): el aro alarga el camino hidráulico de filtración y reduce el gradiente hidráulico en la interfaz hormigón-tubo (fuente concordante)
- Catálogo TECTUL — fichas de producto de las 23 referencias de pasamuros (combinaciones de extremos, diámetros y largos publicados, jul 2026)
This data sheet is the property of TECTUL, part of the Industrias IMR group. Reproduction without attribution is prohibited. Original document and updates: tectul.com/en/conduccion-de-fluidos/accesorios-de-tuberia/ficha-tecnica-pasamuro-acero-al-carbon-extremos-bridados.html.