90 Degree Aluminum Alloy 5083 Elbow Marine
We manufacture 90 Degree Aluminum Alloy 5083 Elbows and marine-grade aluminum pipe fittings for shipbuilding, offshore equipment, cryogenic systems, air-separation plants and lightweight industrial piping.
Our product range includes long-radius and short-radius aluminum elbows, 45° elbows, 180° return bends, tees, reducers, caps and customized pipe fittings.
Finished fittings can be supplied to ASTM B361 / ASME SB-361, with dimensions manufactured according to ASME B16.9 or approved customer drawings. Where seamless construction is required, the elbow may be formed from ASTM B241 / ASME SB-241 Aluminum Alloy 5083 seamless pipe.
5083 Aluminum Elbow Specifications
| Item | Available Specification |
|---|---|
| Product | Aluminum butt weld elbow |
| Material | Aluminum Alloy 5083 |
| Common designation | UNS A95083 / EN AW-5083 |
| Temper | O or project-specified condition |
| Fitting standard | ASTM B361 / ASME SB-361 |
| Raw pipe standard | ASTM B241 / ASME SB-241 |
| Dimensions | ASME B16.9 or approved drawing |
| Angles | 45°, 90° and 180° |
| Custom angles | 22.5°, 30° and 60° |
| Radius | LR 1.5D, SR 1D or customized radius |
| Wall thickness | Schedule 40 or specified numerical thickness |
| Construction | Seamless formed or fabricated |
| Size range | Subject to diameter, wall thickness and tooling review |
| Inspection | Visual, dimensional, wall-thickness and NDT as specified |
| Documentation | Material certificate and inspection reports |
Aluminum 5083 Long-Radius 90° Elbow
A long-radius 90-degree aluminum elbow changes the direction of the piping system by 90 degrees while maintaining a relatively smooth flow path.
The standard long-radius centerline is generally 1.5 times the nominal pipe diameter. LR elbows are commonly selected where pressure loss, turbulence and flow disturbance need to be reduced.
Typical applications include:
- Marine piping systems
- Shipbuilding equipment
- Offshore modules
- Cryogenic piping
- Industrial gas equipment
- Air-separation equipment
- Lightweight process piping
Aluminum 5083 Short-Radius 90° Elbow
A short-radius aluminum elbow normally has a centerline radius equal to approximately one pipe diameter.
SR elbows are suitable for compact piping arrangements where installation space is limited. However, they generally create a sharper change in flow direction than long-radius elbows.
The choice between LR and SR should consider:
- Available installation space
- Flow velocity
- Pressure loss
- Pipe diameter
- Wall thickness
- Project piping specification
Why Use Aluminum Alloy 5083?
Aluminum Alloy 5083 is a non-heat-treatable aluminum-magnesium alloy widely used in welded marine structures.
It is commonly selected because it offers:
- Good resistance to seawater corrosion
- Predictable post-weld strength
- Good weldability
- Low material density
- Useful low-temperature performance
5083 as a preferred alloy for marine applications because of its resistance to seawater corrosion and predictable properties after welding. Material suitability must still be confirmed against the operating fluid, temperature, pressure, galvanic contact and project design requirements.
ASTM B361, ASTM B241 and ASME B16.9
The three standards perform different functions and should not be treated as interchangeable.
| Standard | Main function |
|---|---|
| ASTM B361 / ASME SB-361 | Finished wrought aluminum and aluminum-alloy welding fittings |
| ASTM B241 / ASME SB-241 | Seamless aluminum pipe and seamless extruded tube |
| ASME B16.9 | Butt weld fitting dimensions, tolerances, testing and marking |
ASTM B361-16(2024) covers factory-made wrought aluminum and aluminum-alloy welding fittings. It includes butt-welding and applicable socket-end components manufactured under controlled factory conditions. (ASTM Store)
ASTM B241/B241M-22 covers aluminum and aluminum-alloy seamless pipe and seamless extruded tube. It may therefore specify the raw pipe used to form an elbow, but it is not the finished fitting standard. (ASTM International)
ASME B16.9 covers overall dimensions, tolerances, ratings, testing and marking for factory-made wrought butt weld fittings from NPS 1/2 through NPS 48. It provides the dimensional framework but does not independently certify the aluminum alloy or temper.
A complete product description can be written as:
ASTM B361 Aluminum Alloy 5083-O, 90° Long Radius Butt Weld Elbow, dimensions to ASME B16.9, manufactured from ASTM B241 seamless pipe.
Schedule 40 Aluminum Elbows
We can manufacture Schedule 40 Aluminum Alloy 5083 elbows to match the specified pipe.
The term “Schedule 40” should be supported by the actual pipe dimensions because aluminum piping projects may use standard NPS dimensions, metric dimensions or customized pipe sizes.
A complete inquiry should state:
- Nominal pipe size
- Actual outside diameter
- Nominal wall thickness
- Minimum wall thickness after forming
- Long radius or short radius
- Applicable dimensional standard
For example:
Aluminum Alloy 5083-O, 90° LR Elbow, OD 114 mm × WT 6 mm, ASTM B361, dimensions according to approved drawing.
Standard Manufacturing Sizes
| Outside Diameter | Wall Thickness | Available Type |
|---|---|---|
| 48 mm | 5 mm | LR / SR elbow |
| 60 mm | 7 mm | LR / SR elbow |
| 89 mm | 4 mm | LR / SR elbow |
| 89 mm | 5.5 mm | LR / SR elbow |
| 114 mm | 6 mm | LR / SR elbow |
| 141 mm | 7 mm | LR / SR elbow |
| 168 mm | 10 mm | LR / SR elbow |
| 168 mm | 14 mm | LR / SR elbow |
| 169 mm | 8 mm | LR / SR elbow |
| 219 mm | 10 mm | LR / SR elbow |
| 219 mm | 12 mm | LR / SR elbow |
These are metric manufacturing sizes and should not automatically be interpreted as exact ASME nominal pipe dimensions. Availability is subject to raw-material supply, forming tooling, quantity and inspection requirements.
Available Aluminum Pipe Fittings
In addition to 90° elbows, we can manufacture:
- 45° long-radius elbows
- 90° short-radius elbows
- 180° return bends
- Equal tees
- Reducing tees
- Equal crosses
- Reducing crosses
- Concentric reducers
- Eccentric reducers
- Aluminum pipe caps
- Customized fabricated fittings
Custom elbow angles such as 22.5°, 30° and 60° can be produced according to approved drawings.
Manufacturing and Inspection
The typical manufacturing process includes:
- Raw-material certificate review
- Cutting and blank preparation
- Cold forming or controlled forming
- Dimensional correction
- Welding-end preparation
- Wall-thickness measurement
- Visual and dimensional inspection
- Product marking and export packing
Additional inspection can include:
- Dye penetrant testing
- Radiographic testing for fabricated welds
- Pressure testing when specified
- Positive material identification
- Third-party inspection
- Material traceability records
Testing methods, sampling quantities and acceptance criteria should be stated in the purchase order.
Applications
Aluminum Alloy 5083 elbows and pipe fittings are commonly used in:
- Shipbuilding
- Marine piping
- Offshore equipment
- Seawater-related systems
- Cryogenic equipment
- Air-separation plants
- Industrial gas systems
- Heat exchangers
- Lightweight process piping
- Customized aluminum pipe spools
The final material selection must consider design pressure, temperature, medium, welding condition and galvanic compatibility.
Information Required for Quotation
Please provide:
- Elbow angle
- Long radius or short radius
- Nominal size
- Actual outside diameter
- Wall thickness
- Material alloy and temper
- ASTM B361 or ASME SB-361
- ASME B16.9 or customer drawing
- Minimum wall thickness after forming
- Quantity
- Inspection requirements
- Certificate requirements
Frequently Asked Questions
Which standard covers 5083 aluminum elbows?
ASTM B361 / ASME SB-361 covers factory-made wrought aluminum and aluminum-alloy welding fittings. ASME B16.9 may be specified for the dimensional pattern.
Is ASTM B241 an aluminum elbow standard?
No. ASTM B241 covers seamless aluminum pipe and seamless extruded tube. It can specify the raw pipe used to form an elbow.
What is the difference between LR and SR elbows?
A long-radius elbow normally has a centerline radius of 1.5D, while a short-radius elbow normally has a radius of 1D.
Is Aluminum Alloy 5083 suitable for marine piping?
5083 is widely used in marine structures because of its seawater corrosion resistance and weldability. Final suitability depends on the actual service conditions and piping design.
Can you manufacture nonstandard aluminum elbows?
Yes. Metric diameters, custom wall thicknesses, special angles and drawing-specific radii can be manufactured after technical review.
Aluminum 5083 Elbow Manufacturer
We manufacture Aluminum Alloy 5083 90-degree elbows, marine-grade aluminum pipe fittings and customized aluminum piping components for international marine and industrial projects.
Products can be supplied according to the required alloy, temper, fitting standard, dimensions, inspection plan and documentation requirements.
5083 seamless pipe fittings are made from ASTM-B-241 5083 Seamless pipe
