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304L Stainless Steel 5D Elbow

304L Stainless Steel 5D Elbow

The 304L Stainless Steel 5D Elbow is a butt-weld fitting for changing direction in stainless steel piping. Its centerline radius is approximately five times the outside diameter of the connected pipe, creating a long-radius bend for piping layouts that require a gradual directional transition. 304L stainless steel is identified as UNS S30403 and EN 1.4307. The low-carbon austenitic grade is commonly specified for welded piping where material control, corrosion resistance and weldability are important. The 5D configuration is selected when a longer bend radius is required than standard short-radius elbow designs.
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Product Introduction

The 304L Stainless Steel 5D Elbow is a butt-weld fitting for changing direction in stainless steel piping. Its centerline radius is approximately five times the outside diameter of the connected pipe, creating a long-radius bend for piping layouts that require a gradual directional transition.


304L stainless steel is identified as UNS S30403 and EN 1.4307. The low-carbon austenitic grade is commonly specified for welded piping where material control, corrosion resistance and weldability are important. The 5D configuration is selected when a longer bend radius is required than standard short-radius elbow designs.

 

 

Key Product Characteristics


5D Bend Radius
The centerline radius is approximately 5D, with D referring to the pipe outside diameter. This extended radius provides a longer transition between the two pipe runs.


304L Stainless Steel
The fitting uses 304L stainless steel with a controlled low-carbon composition. Material grade, heat number and applicable material specification can be recorded with the production documentation.


Butt-Weld Connection
The ends are prepared for butt welding to the connected pipe. End geometry is coordinated with the specified wall thickness and welding requirements.


Long-Radius Geometry
The 5D form requires more routing space than shorter-radius elbows. The required centerline radius should be checked against the available installation envelope.

 

 

Technical Parameters

 

Parameter

Specification

Product Type

304L Stainless Steel 5D Elbow

Material

304L Stainless Steel

UNS

S30403

EN Grade

1.4307

Radius

5D

Centerline Radius

Approx. 5 × outside diameter

Bend Angle

45°, 90°

Connection

Butt Weld

Size

According to pipe outside diameter

Wall Thickness

According to pipe specification

End Preparation

According to wall thickness and welding requirement

Surface Finish

Pickled, polished or specified finish

Material Standard

ASTM A403 or specified material standard

Dimensional Basis

Applicable standard or approved drawing

Inspection

Visual and dimensional inspection; material verification as specified

 

 

Material & Construction


Low-Carbon Composition
304L uses a lower carbon level than conventional 304 stainless steel. This characteristic is relevant to welded stainless steel components where the specified material grade must be maintained throughout fabrication.


Controlled Forming
The elbow is formed around the required 5D centerline radius. Production control focuses on radius, bend angle, outside diameter, wall thickness and center-to-end dimensions.


Surface Finish
The surface can be supplied in a specified condition such as pickled or polished. Finish requirements should be defined according to the piping service and project specification.

 

 

Dimensional Selection


Outside Diameter
The pipe outside diameter establishes the reference dimension for the 5D radius. The required pipe size should be confirmed before production.


Wall Thickness
Wall thickness should correspond with the connected piping specification. Nominal thickness, schedule or drawing dimensions can be used for specification.


Bend Angle
45° and 90° configurations cover common directional changes. Other angles can be specified when a defined dimensional requirement is provided.


End Dimensions
Center-to-end dimensions and weld-end preparation should be confirmed when the elbow is being integrated into a defined piping assembly.

 

 

Typical Applications


Process Piping
Used for stainless steel process lines where a long-radius directional change is required within the piping arrangement.


Chemical Processing
Suitable for selected chemical process lines where 304L stainless steel is specified for the piping system and welded construction is required.


Water Treatment
Used in stainless steel fluid-transfer systems where the specified material and long-radius configuration match the piping design.


Food & Pharmaceutical Processing
Applicable to stainless steel process piping where material identification, surface condition and dimensional control form part of the project requirements.

 

 

Manufacturing & Inspection


Material Verification
Material identification is checked against the specified 304L grade and applicable purchase requirements. Heat or batch information can be retained in production records where required.


Radius & Angle
The formed elbow is checked against the specified 5D geometry. Bend angle and centerline dimensions are controlled to maintain the required configuration.


Wall Thickness
Wall thickness is measured at defined inspection locations to verify compliance with the specified piping requirement.


Surface Condition
The finished fitting is visually inspected for surface condition, forming marks and visible defects before final preparation and packing.

 

 

Standards & Documentation


Material Specification
ASTM A403 covers wrought austenitic stainless steel piping fittings and includes requirements related to material composition, heat treatment, mechanical properties and product examination. The applicable grade and class should be stated in the order specification.


Dimensional Specification
The applicable fitting dimensional standard or approved drawing should define the required outside diameter, wall thickness, bend angle, center-to-end dimensions and 5D radius.


Inspection Records
Material certificates, dimensional inspection records and other specified quality documents can be prepared according to project requirements.

 

 

Selection Checklist


Material
Confirm 304L stainless steel, UNS S30403 and the required material specification.


Geometry
Specify the 5D radius, bend angle and required centerline dimensions.


Pipe Data
Provide outside diameter, wall thickness or schedule for the connected pipe.


Finish
State the required surface condition, such as pickled or polished finish.


Documentation
Confirm required material certificates, inspection records, marking and applicable standards before production.

 

 

FAQ

 

Q: What does 5D mean on a stainless steel elbow?

A: 5D refers to a centerline radius of approximately five times the outside diameter of the connected pipe.

Q: What material is used for this elbow?

A: The fitting is made from 304L stainless steel, commonly identified as UNS S30403 and EN 1.4307.

Q: Which angles are available?

A: 45° and 90° are common configurations. Other angles can be specified according to the required dimensions.

Q: Can the elbow be butt welded?

A: Yes. The fitting has butt-weld ends, with end preparation matched to the specified wall thickness and welding requirements.

Q: What information is needed for an inquiry?

A: Provide the material grade, pipe outside diameter, wall thickness or schedule, bend angle, 5D radius, required standard, surface finish, quantity and any drawing or inspection requirements.

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