Threaded / Screwed Unequal Tees
Threaded / Screwed Unequal Tees
ASME B16.11 | Forged Threaded/Screwed Unequal Tees | Class 2000–6000 | NPS 1/8–4
Elite provides high-quality Forged Threaded / Screwed Unequal Tees for industrial piping, process systems, oil & gas, petrochemical, chemical processing, power generation and general engineering applications. Manufactured using controlled forging and precision machining processes, these fittings are designed to provide reliable dimensional accuracy, material integrity and long-term service performance.
Threaded / Screwed Unequal Tees, also known as Threaded Reducing Tees, are used to divide or combine flow between piping connections of different nominal sizes. The reduced branch provides a practical solution where a smaller connection is required from the main piping run. Elite can supply standard and project-specific configurations in carbon steel, stainless steel, alloy steel, duplex, super duplex, copper-nickel and nickel alloys.
ASME B16.11 Forged Threaded / Screwed Unequal Tee Available Types
| Standard Threaded Unequal Tees | Specialty / Material Options |
|---|---|
| Forged Threaded Unequal Tee | Forged Threaded Reducing Tee |
| ASME B16.11 Threaded Reducing Tee | Class 2000 Threaded Unequal Tee |
| Class 3000 Threaded Unequal Tee | Class 6000 Threaded Unequal Tee |
| Stainless Steel Threaded Unequal Tee | Carbon Steel Threaded Unequal Tee |
| Alloy Steel Threaded Unequal Tee | Duplex Steel Threaded Unequal Tee |
| Super Duplex Threaded Unequal Tee | Copper-Nickel Threaded Unequal Tee |
| Nickel Alloy Threaded Unequal Tee | Monel Threaded Unequal Tee |
| Inconel Threaded Unequal Tee | Hastelloy Threaded Unequal Tee |
| Titanium Threaded Unequal Tee | Custom Forged Threaded Unequal Tee |
Standard Specifications for Forged Threaded / Screwed Unequal Tee
| Specification | Details | |
|---|---|---|
| Product Type | Forged Threaded / Screwed Unequal Tee | |
| Design / Dimensions | ASME B16.11 | |
| Thread Standard | ASME B1.20.1 / Project Specified | |
| Additional Standards | BS 3799, where applicable | |
| Size Range | NPS 1/8" to 4" | |
| Pressure Classes | 2000, 3000 and 6000 | |
| Configuration | Reducing / Unequal Tee | |
| Branch Size | Smaller than Run Size | |
| End Connection | Threaded / Screwed | |
| Thread Type | NPT or project specified | |
| Construction | Forged | |
| Bore | Standard or project specified | |
| Surface Finish | Standard or customer specified | |
| Heat Treatment | As required by material specification | |
| Marking | Size, class, material, heat number and required identification | |
| Documentation | MTC, COC and project-required quality records | |
| Note: Pressure classes are stated according to the applicable ASME B16.11 threaded fitting configuration. Special pressure classes or non-standard designs can be supplied where specifically engineered and agreed for the project. | ||
Custom Engineering
| Custom Requirement | Details |
|---|---|
| Nominal Size | NPS / DN or project specific |
| Run Size | Required nominal size |
| Branch Size | Reduced / project specified |
| Pressure Class | 2000 / 3000 / 6000 or project specified |
| Tee Type | Unequal / Reducing Tee |
| Material | Required material grade |
| Connection | Threaded / Screwed |
| Thread Type | NPT / Project specified |
| Bore | Standard / Project specified |
| Wall Thickness | Project specified |
| Heat Treatment | As required |
| NDE | Project specified |
| Quality Requirements | ITP / Third-party requirements |
| Marking | Customer requirements |
| Documentation | MTC / COC / Quality reports |
Testing & Examination
| Test / Examination | Availability |
|---|---|
| Chemical Analysis | Material dependent |
| Tensile & Yield Testing | Material dependent |
| Impact Testing | Where required |
| Hardness Testing | As specified |
| Positive Material Identification (PMI) | As specified |
| Ultrasonic Testing (UT) | As specified |
| Magnetic Particle Testing (MT) | As specified |
| Liquid Penetrant Testing (PT) | As specified |
| Radiographic Testing (RT) | As specified |
| Intergranular Corrosion Testing | Where applicable |
| Pitting / Corrosion Testing | Where applicable |
| Macro / Micro Examination | Where specified |
| Additional Project-Specified Tests | Available |
| Third-Party Verification | Available |
Documentation Package
| Document | Availability |
|---|---|
| Material Test Certificate (MTC) | Available |
| EN 10204 3.1 | Available |
| EN 10204 3.2 | Where specified |
| Certificate of Conformance (COC) | Available |
| Dimensional Report | Available |
| Chemical Analysis Report | Material dependent |
| Mechanical Test Report | Material dependent |
| Heat Treatment Records | Where applicable |
| PMI Report | As specified |
| NDE Reports | As specified |
| Quality Assurance Plan (QAP) | Project specific |
| Inspection & Test Plan (ITP) | Project specific |
| Certificate of Origin | Available |
| Packing List | Available |
| Commercial Invoice | Available |
| Fumigation Certificate | Where applicable |
| Material Traceability Records | Maintained |
| Third-Party Inspection Certificate | Available |
Applicable Standards
- ASME B16.11 — Forged Fittings, Socket-Welding and Threaded
- ASME B1.20.1 — Pipe Threads, General Purpose
- BS 3799 — Steel Pipe Fittings, Screwed and Socket-Welding for the Petroleum Industry, where applicable
- ASME B31.3 — Process Piping, where applicable
- Applicable ASTM/ASME material specifications
- NACE MR0175 / ISO 15156, where applicable
- Customer drawings and project specifications
Note: ASME B16.11 establishes dimensional and pressure-temperature requirements for forged threaded and socket-weld fittings. Thread requirements are governed by the applicable thread standard, while material requirements are governed by the applicable ASTM/ASME material specification.
Materials
Stainless Steel
ASTM/ASME A182 F304/F304L, F316/F316L, F304H, F316H, F316Ti, F317/F317L, F321/F321H, F347/F347H and F904L, with other stainless grades available to project requirements.
Duplex & Super Duplex
ASTM/ASME A182 F51, F53 and F55, including UNS S31803, S32205, S32550, S32750, S32760 and S32950.
Carbon Steel
ASTM/ASME A105/A105N and A350 LF2/LF3, with other project-specified carbon steel grades available where applicable.
Alloy Steel
ASTM/ASME A182 F1, F5, F9, F11, F12, F22, F23, F91 and F92, with other alloy grades available according to project requirements.
Copper-Nickel Alloys
ASTM/ASME SB111 and SB466, including UNS C70600 (90/10 Cu-Ni) and C71500 (70/30 Cu-Ni).
Nickel Alloys
Nickel 200/201, Monel 400/K500, Alloy 20, Inconel 600/601/625/825 and Hastelloy C276, including applicable ASTM/ASME specifications.
Titanium & Special Alloys
Titanium and other specialty alloys can be supplied according to customer specifications, process conditions and project requirements.
Material selection is based on operating pressure, temperature, process fluid, corrosion conditions, mechanical requirements and applicable project specifications.
Forged Threaded / Screwed Unequal Tee Configurations
Standard Threaded Unequal Tee
A forged fitting with three threaded connections where the branch connection is smaller than the main run connections.
Threaded Reducing Tee
A reducing configuration designed to branch from a larger main pipe into a smaller diameter piping connection.
High-Pressure Threaded Unequal Tee
Forged construction suitable for high-pressure piping applications and available in applicable pressure classes according to material, design and project requirements.
Custom Threaded Unequal Tee
Special run and branch sizes, bore configurations, wall thicknesses, materials, thread details, end configurations and markings can be supplied according to customer drawings and project specifications.
Design Features
- Forged construction
- Unequal / reducing configuration
- Smaller branch connection
- Threaded / screwed connections
- NPT and project-specific thread options
- Compact installation configuration
- High-pressure service capability
- Multiple material options
- Carbon steel, stainless steel, alloy and specialty alloy construction
- Suitable for elevated-temperature service
- Suitable for corrosive and sour-service applications where specified
- Standard and custom dimensions
- Heat-number traceability
- PMI and NDE available
- Customer-specific marking
- Project-specific quality documentation
Manufacturing & Quality
Elite’s manufacturing process can include:
- Raw material verification
- Forging preparation
- Forging
- Heat treatment
- CNC machining
- Thread machining
- Bore machining
- Surface finishing
- Dimensional verification
- Heat-number traceability
- Product identification
- Hardness verification
- PMI
- Final quality verification
- Marking and packing
Product Types
- Forged Threaded / Screwed Unequal Tees
- Forged Threaded Reducing Tees
- ASME B16.11 Threaded Unequal Tees
- Class 2000 Threaded Unequal Tees
- Class 3000 Threaded Unequal Tees
- Class 6000 Threaded Unequal Tees
- Stainless Steel Threaded Unequal Tees
- Carbon Steel Threaded Unequal Tees
- Alloy Steel Threaded Unequal Tees
- Duplex & Super Duplex Threaded Unequal Tees
- Copper-Nickel Threaded Unequal Tees
- Nickel Alloy Threaded Unequal Tees
- Monel Threaded Unequal Tees
- Inconel Threaded Unequal Tees
- Hastelloy Threaded Unequal Tees
- Titanium Threaded Unequal Tees
- Custom Forged Threaded Unequal Tees
Applications
Forged Threaded / Screwed Unequal Tees are commonly used in:
- Oil & Gas
- Refineries
- Petrochemical Plants
- Chemical Processing
- Cement Plants
- Fertilizer Plants
- LNG & Natural Gas
- Power Generation
- Offshore & Marine
- Shipbuilding
- Process Plants
- Process Skids
- High-Pressure Piping
- Steam Systems
- Hydraulic Systems
- Instrument Piping
- Water Treatment
- Paper & Pulp Plants
- Food Processing
- Pharmaceutical Plants
- Fabrication & Engineering Projects
- General Industrial Piping
Ordering Information
For quotation, provide:
Run Size + Branch Size + Pressure Class + Tee Type + Material + Thread Type + Quantity + Quality Requirements
Example
2″ × 1″ Class 6000 Threaded Unequal Tee, ASTM A182 F316L, Forged Construction, NPT Threaded Ends, Project-Specified Dimensions, EN 10204 3.1.
