90° female-female NPT bronze elbow — class 125 (catalog reference B100)
TECTUL · Dispatch across Colombia · Exports to Central & South America
90° elbow in cast brass bronze, with female NPT thread on both ends, for direction changes in low-pressure water and air lines. It is a class 125 fitting per ASME B16.15: 200 psi (13.8 bar) cold with water, oil or non-flammable gas up to 66 °C, and 125 psi with saturated steam. The TECTUL catalog offers it in 1/8″, 1/4″, 3/8″ and 1/2″; the manufacturer only publishes verified dimensions and weight for 1/8″ and 1/4″— the two larger references are confirmed on quotation.
IMPORTANT: reference data — may differ from the physical product; verify with an advisor before buying.
SKU VT-59152 (B100 bronze elbow) · 4 diameter variants 1/8″–1/2″ · sold by the unit
1. Technical specifications
Dimensions by diameter
| NPT size | D (female thread Ø) [mm] | L (overall length) [mm] | Weight [g] |
|---|---|---|---|
| 1/8″ | 13.0 | 19.0 | 25 |
| 1/4″ | 17.0 | 32.0 | 38 |
| 3/8″ (made to order) | Confirmed on quotation — no manufacturer dimensional sheet | ||
| 1/2″ (made to order) | Confirmed on quotation — no manufacturer dimensional sheet | ||
IMPORTANT
This technical data sheet is a reference guide to the properties of this product type; it is not a quality certificate for the product you are buying. The measurements, dimensions and physical or geometric characteristics of the product supplied may vary by manufacturer, heat and lot, and may even fall outside the cited standards. If any of these figures is critical to your design or build, verify it with one of our advisors against the physical product or the lot's mill certificate, so you can be fully certain of what you are buying. · Original data sheet: tectul.com/en/conduccion-de-fluidos/racores-y-acoples/ficha-tecnica-b100-codo-bronce.html
Reference manufacturer photos and measurements, subject to change without prior notice (source sheet: threaded bronze fittings catalog, March 2022 revision).
General specifications
| Product | 90° bronze elbow, female NPT thread on both ends |
| Material | Cast brass bronze |
| Thread | NPT (National Pipe Thread, tapered) per ANSI/ASME B1.20.1 |
| Pressure rating | Class 125 (ASME B16.15): 200 psi (13.8 bar) with water, oil or non-flammable gas at ≤66 °C · 125 psi (8.6 bar) with saturated steam |
| Commercial range | 1/8″–1/2″ NPT |
| Sale | By the unit, per diameter |
| Applicable standards | ASME B16.15 (pressure classes for threaded bronze fittings) · ANSI/ASME B1.20.1 (NPT thread) |
2. Engineering calculations: correct rating reading
Converting the catalog rating
The 200 psi rating published for ASME B16.15 class 125 is a cold gauge pressure (≤66 °C). Direct unit conversion:
- Catalog figure: 200 psi at ≤66 °C.
- Conversion to bar: 200 psi × 0.06895 bar/psi = 13.79 bar ≈ 13.8 bar.
- Conversion to kgf/cm²: 200 psi × 0.0703 kgf/cm²/psi = 14.06 kgf/cm².
- Saturated steam: the same body drops to 125 psi (8.6 bar) because steam demands an extra safety margin over cold water at the same nominal pressure — standard MSS/ASME practice for threaded bronze fittings.
What this figure does NOT cover
200 psi is a single point at room temperature. Above 66 °C, ASME B16.15 requires a manufacturer-specific derating curve not published in the available dimensional sheet; for design temperatures above 66 °C, request the full pressure-temperature curve before specifying.
3. Frequently asked questions
What is the difference between this elbow and the B116 street elbow?
The B100 has female thread on both ends (two pipes enter it). The B116 is a "street elbow": one end is male thread and the other female, meant to screw directly into another fitting without an intermediate nipple. They are different catalog items, not aliases.
Is this elbow suitable for 150 psi compressed air?
Yes, 150 psi is below its 200 psi (13.8 bar) room-temperature rating. Also verify the thread sealant is compatible with compressed air and any lubricant oil carried in the line.
Why do the 3/8″ and 1/2″ sizes have no dimensional table?
The manufacturer only published verified dimensions and weight for 1/8″ and 1/4″ in the source sheet; the larger TECTUL catalog references are made to order and their exact dimensions are confirmed on quotation.
Can it be used with steam?
Yes, up to 125 psi (8.6 bar) saturated steam, which is the class 125 reduced rating for that service — do not use the 200 psi figure for steam.
4. Application notes
Feasibility
Suitable for water, compressed air and oil at low pressure (≤200 psi/13.8 bar cold) in building, pneumatic and minor hydraulic installations. Do not use for potable water if the application requires specific NSF/ANSI 61 certification (not declared in the available manufacturer sheet), nor with fluids corrosive to the bronze's copper/zinc.
Installation
Seal the NPT thread with PTFE tape or a service-fluid-compatible sealant. Always hold by the fitting's hex or body, never by the adjacent pipe, when tightening. Do not exceed the pipe manufacturer's recommended torque: bronze is softer than steel and the thread can deform from over-tightening.
Design
Use the 200 psi (13.8 bar) rating only for cold service (≤66 °C) with water, oil or non-flammable gas; for steam use 125 psi. For design temperatures above 66 °C, request the full pressure-temperature curve from the manufacturer before specifying, since it is not published in the available dimensional sheet. Final diameter and fitting selection is the responsibility of the line designer.
5. Technical notice and limitation of liability
The pressures, dimensions, weights and other characteristics in this sheet are theoretical calculation values obtained from nominal properties published in the standards cited (ASME B36.10-2022, ASME B31.3-2024, ASTM A106/A106M-19a, ASTM A53/A53M-24, API Spec 5L 46th ed.). They guide selection; they are not a certificate of conformity for any given lot.
The actual behavior of each lot varies with manufacturing — wall tolerance (up to −12.5%), out-of-roundness, residual stresses — and with the raw material — chemical composition within the ranges the standard allows, heat-to-heat differences. To certify a lot, the tests defined by its product standard are required: tensile test, flattening test and hydrostatic test, documented in the manufacturer's mill test certificate (MTC), which TECTUL supplies upon request; testing of the lot in an independent laboratory can also be arranged.
These values must not be used as the sole criterion in critical or safety applications, or wherever failure of the line may compromise people, property or the environment: in such cases the design belongs to the project's responsible engineer under the applicable code (ASME B31.3, B31.1 or the one governing the installation), with the design temperature, corrosion allowance and load cases of the actual service. Before deciding with these data, consult our technical team.
Sources
- ASME B16.15-2020 — Cast Bronze Threaded Fittings: Classes 125 and 250 (rating 200 psi ≤66 °C agua/aceite/gas no inflamable y 125 psi vapor saturado para clase 125)
- ANSI/ASME B1.20.1-2013 (R2018) — Pipe Threads, General Purpose, Inch (rosca NPT)
- Ficha de fabricante "B100 - Codo 90°" (catálogo de accesorios roscados de bronce, IMR/TECTUL, última revisión marzo 2022): dimensiones D/L y peso para 1/8″ y 1/4″
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/racores-y-acoples/ficha-tecnica-b100-codo-bronce.