Buttweld Equal Tees
Buttweld Equal Tees
ASME B16.9 | Equal / Straight Tees | Butt-Welding Pipe Fittings | Carbon Steel, Stainless Steel, Duplex, Alloy & Nickel Alloys
Elite Buttweld Equal Tees, also known as Straight Tees, are factory-made pipe fittings used to create a 90° branch connection from the main pipeline. An equal tee has the same nominal pipe size at the run and branch outlets, providing a full-size branch connection for process and utility piping systems.
Elite supplies seamless, welded and fabricated Equal Tees in a wide range of carbon steel, stainless steel, duplex, alloy steel, nickel alloy and other materials. Standard dimensions are manufactured in accordance with ASME B16.9, with special sizes and configurations available according to project requirements.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Elite |
| Product | Buttweld Equal Tee / Straight Tee |
| Primary Standard | ASME B16.9 |
| Configuration | Equal Tee |
| Run Size | Same as Branch Size |
| Branch Angle | 90° |
| Size Range | NPS 1/2"–48" |
| Construction | Seamless / Welded / Fabricated |
| End Connection | Butt Weld |
| Wall Thickness | SCH 5S, 10S, 20, 40S, STD, 80S, XS, 100, 120, 140, 160, XXS and custom |
| Dimensions | ASME B16.9 where applicable |
| End Preparation | ASME B16.25 where applicable |
| Material Standards | ASTM / ASME applicable specifications |
| Heat Treatment | According to material and applicable specification |
| Surface Finish | Pickled / Blasted / Polished / Coated / Project Specified |
| Inspection | Visual, dimensional, PMI, UT, RT, MT, PT, hardness and other NDE as specified |
| Documentation | MTC, EN 10204 3.1/3.2, inspection reports and project documentation |
Product Configurations
| Configuration | Description | |
|---|---|---|
| Equal Tee | Run and branch have the same nominal size | |
| Seamless Equal Tee | Seamless construction for applicable sizes/materials | |
| Welded Equal Tee | Welded construction for selected sizes/materials | |
| Fabricated Equal Tee | Custom large-diameter or special construction | |
| Barred Tee | Special internal configuration for project-specific requirements | |
| Note: A Reducing Tee is a different product, with a smaller branch size than the run. A Lateral Tee has an angled branch and should be listed separately from a standard Equal Tee. | ||
Applicable Standards
ASME B16.9
Primary dimensional standard for factory-made wrought buttwelding fittings, including Equal Tees.
ASME B16.25
Butt-welding end preparation.
ASTM / ASME Material Specifications
Applicable material standards according to the selected material and grade.
ASME B31.3 / B31.1
Process and power piping requirements, where applicable.
NACE MR0175 / ISO 15156
For sour-service applications when specifically required by the project.
ASME Section II
Material requirements where applicable to pressure equipment and project specifications.
Note: ASME B16.28 should not be listed as the primary standard for Equal Tees. Equal Tees are covered by the current ASME B16.9 standard.
Materials
Carbon Steel
ASTM A234 WPB, WPC and applicable WPHY grades including WPHY 42, WPHY 46, WPHY 52, WPHY 60, WPHY 65 and WPHY 70.
Low Temperature Carbon Steel
ASTM A420 WPL3, WPL6 and other applicable grades.
Stainless Steel
ASTM A403 WP304/304L, WP316/316L, WP321/321H, WP347/347H and other applicable grades.
Duplex & Super Duplex
ASTM A815 grades including UNS S31803, S32205, S32750 and S32760.
Alloy Steel
ASTM A234 WP1, WP5, WP9, WP11, WP12, WP22 and WP91.
Nickel Alloys
ASTM B366 and applicable specifications for Nickel 200/201, Monel 400/K500, Inconel 600/601/625/800/825, Hastelloy C276 and Alloy 20.
Copper-Nickel Alloys
Applicable Cu-Ni grades including UNS C70600 and C71500.
Titanium
Applicable titanium grades manufactured to the relevant ASTM specification, including ASTM B363 where applicable.
Material selection is based on operating pressure, temperature, process fluid, corrosion conditions, mechanical requirements and applicable project specifications.
Equal Tee Configurations
Standard Equal Tee
Run and branch outlets have the same nominal pipe size.
Seamless Equal Tee
Manufactured from seamless pipe or billet for applicable sizes, materials and wall thicknesses.
Welded Equal Tee
Welded construction for selected sizes and materials where permitted by the applicable specification.
Fabricated Equal Tee
Custom-fabricated for large diameters, special wall thicknesses and project-specific configurations.
Barred Equal Tee
Special reinforced or internally barred configuration used where flow or pigging requirements require internal control. Manufactured according to project requirements rather than treated as a standard B16.9 Equal Tee configuration.
Design Features
- Equal-size run and branch outlets
- 90° branch connection
- Butt-welding ends for permanent piping connections
- Standard ASME B16.9 dimensions where applicable
- Seamless, welded and fabricated construction
- Controlled wall thickness and dimensional tolerances
- Smooth internal transition between run and branch
- Beveled ends according to ASME B16.25 where applicable
- Wide range of material and grade options
- PMI and NDE available for critical services
- Custom dimensions and configurations available
Dimensions & Wall Thickness
Standard Equal Tee dimensions are manufactured in accordance with ASME B16.9, where applicable.
Available wall thicknesses include:
SCH 5S, 10S, 20, 40S, STD, 80S, XS, 100, 120, 140, 160 and XXS, together with project-specific wall thicknesses.
Dimensional requirements include:
- Outside diameter
- Run size
- Branch size
- Center-to-end dimensions
- Wall thickness
- End preparation
- Overall geometry
- Dimensional tolerances
For non-standard large-diameter or fabricated Equal Tees, dimensions can be manufactured according to approved engineering drawings.
Design Features
- Equal-size run and branch outlets
- 90° branch connection
- Butt-welding ends for permanent piping connections
- Standard ASME B16.9 dimensions where applicable
- Seamless, welded and fabricated construction
- Controlled wall thickness and dimensional tolerances
- Smooth internal transition between run and branch
- Beveled ends according to ASME B16.25 where applicable
- Wide range of material and grade options
- PMI and NDE available for critical services
- Custom dimensions and configurations available
Manufacturing & Quality
Elite Equal Tees are manufactured using suitable forming, welding and fabrication processes according to material, size and project requirements.
Quality control can include:
- Raw material inspection
- Heat number traceability
- Chemical and mechanical verification
- Dimensional inspection
- Visual inspection
- Positive Material Identification (PMI)
- Hardness testing
- Ultrasonic Testing (UT)
- Radiographic Testing (RT)
- Magnetic Particle Testing (MT)
- Liquid Penetrant Testing (PT)
- Heat-treatment verification
- Final marking and identification
- Material Test Certificates
- Inspection and test reports
Custom Engineering
Elite can manufacture Equal Tees according to customer drawings, piping isometrics and project specifications, including:
- Large-diameter Equal Tees
- Special wall thickness
- Custom dimensions
- Heavy-wall construction
- High-pressure and high-temperature service
- Sour-service requirements
- Special alloy materials
- Fabricated Equal Tees
- Special end preparations
- Internal bars or reinforcement
- Special coatings and finishes
- Client-specific inspection requirements
Inspection & Documentation
Depending on project requirements, supply can include:
- Material Test Certificate
- EN 10204 3.1 / 3.2
- Dimensional Inspection Report
- PMI Report
- Heat Treatment Report
- NDE Reports
- Hardness Report
- Hydrostatic Test Report where required
- Certificate of Conformance
- Packing List
- Certificate of Origin
- Third-Party Inspection documentation
Applications
Elite Buttweld Equal Tees are used in:
- Oil & Gas
- Refineries
- Petrochemical Plants
- Chemical Processing
- LNG & Natural Gas
- Power Generation
- Process Piping
- Offshore & Marine
- Water Treatment
- Desalination
- Pulp & Paper
- Pharmaceutical Processing
- Food Processing
- Heat Exchanger Systems
- Boiler & Utility Piping
- Industrial Fabrication
Equal Tees are particularly suitable for piping systems requiring a full-size 90° branch connection from the main pipeline.
Ordering Information
When ordering Buttweld Equal Tees, please specify:
| Item | Required Information |
| Product | Buttweld Equal Tee |
| Size | NPS Run × Branch Size |
| Configuration | Equal Tee / Barred / Fabricated |
| Material & Grade | ASTM / ASME specified grade |
| Wall Thickness | Schedule or actual thickness |
| Construction | Seamless / Welded / Fabricated |
| Standard | ASME B16.9 or project specified |
| End Preparation | ASME B16.25 or project specified |
| Surface Finish | Standard / Pickled / Blasted / Polished / Coated |
| Inspection | PMI / UT / RT / MT / PT / Hardness etc. |
| Documentation | EN 10204 3.1 / 3.2 and project documents |
| Quantity | Required quantity |
| Special Requirements | Drawing, coating, NACE, testing or other project requirements |
Typical Order Example:
6″ × 6″ Equal Tee, ASME B16.9, ASTM A234 WPB, SCH 40, Seamless, ASME B16.25 Bevel Ends, EN 10204 3.1, PMI.
