Carbon Steel Lap Joint Flanges: ASME B16.5, ASTM A105. Get quotes from verified suppliers on MetalMitra.
- Carbon Steel Lap Joint Flanges
- Lap Joint Flanges
- ASME B16.5
- ASTM A105
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Specifications
| Standard | ASME B16.5 |
|---|---|
| Material | ASTM A105, A105N, A350 LF2 |
| Size | 1/2" to 24" |
| Class | 150, 300, 600 |
| Coating | Black, galvanised, epoxy painted |
| Certification | EN 10204 3.1 |
Grades & standards
- Carbon Steel A105
- ASTM A105
- ASME B16.5
Chemical composition & mechanical properties
| C | Mn | P | S | Si |
|---|---|---|---|---|
| 0.35 | 0.60–1.05 | 0.035 | 0.040 | 0.10–0.35 |
| Tensile strength, min | 485 MPa |
|---|---|
| Yield strength (0.2%), min | 250 MPa |
| Elongation in 50 mm, min | 22% |
| Hardness, max | 187 HBW |
Single values are maximums unless marked min. Values per ASTM A105 (forgings); always confirm against the purchase specification and the mill test certificate.
Source Carbon Steel Lap Joint Flanges from verified manufacturers, mills and stockists on MetalMitra. Carbon steel backing flanges for lap joint assemblies, often paired with stainless or alloy stub ends to save cost.
Share your size, grade, quantity and delivery location once, and compare offers from suppliers who stock or manufacture Carbon Steel Lap Joint Flanges to ASME B16.5.
What you can source
- Lap Joint Flanges — Backing flanges to ASME B16.5.
- Stub Ends — Short and long pattern stub ends to MSS SP-43 / B16.9.
- Flange + Stub Sets — Matched backing flange and stub end assemblies.
- Coated Backing Flanges — Galvanised or painted CS backing flanges.
Key properties
- Easy Alignment — The flange rotates freely for quick bolt-hole alignment.
- Cost Saving — Use a CS backing flange with a stainless or alloy stub end.
- Easy Maintenance — Simple dismantling for lines that need frequent cleaning.
- Low Stress — Suited to low-pressure lines with thermal movement.
Applications & industries
- Process Piping
- Water Lines
- Chemical Plants
- Food & Dairy
- Pharmaceutical
- Fire Fighting
- General Utilities
Testing & documentation
Inspection and documentation for Carbon Steel Lap Joint Flanges follow ASME B16.5 plus any extra requirements in your PO.
- Visual & dimensional inspection
- Positive material identification (PMI)
- Hardness test
- Ultrasonic test as applicable
- Third-party inspection on request
- EN 10204 3.1 Mill Test Certificate
Why source on MetalMitra
- Verified suppliers — Mills, manufacturers and stockists are reviewed by the MetalMitra team before they list.
- One RFQ, several quotes — Share size, grade and quantity once and compare offers side by side.
- Full traceability — Heat numbers, test certificates and third-party inspection on request.
- Delivered worldwide — Export-worthy packing and shipping to India, the Middle East, Africa, Europe and the Americas.
Request pricing
Post an RFQ for Carbon Steel Lap Joint Flanges with your drawing or specification and receive quotes from verified suppliers.
Technical note: Values on this page are for reference. Always confirm against the governing standard, your purchase specification and the test certificate.
Applications & industries
- Process Piping
- Water Lines
- Chemical Plants
- Food & Dairy
- Pharmaceutical
- Fire Fighting
- General Utilities
- Oil & Gas
- Petrochemical & Refining
- Chemical Processing
- Water & Wastewater
- Pharmaceutical
- Food & Dairy
Testing & documents
Ask for the documents you need in your requirement — suppliers confirm them in their quotation:
- Mill test certificate to EN 10204 3.1, or 3.2 with third-party witness
- Third-party inspection (TPI) by SGS, Bureau Veritas, TÜV or your nominated agency
- Tests as the standard or your order requires: hydro, PMI, IGC, NDT, hardness or impact tests
FAQs
It lets you use a cheaper backing flange material while only the stub end contacts the process fluid.
Short pattern (MSS SP-43) stub ends are compact; long pattern (ASME B16.9) ones offer more length for welding.
They are mainly used for low- to medium-pressure services.
Need Carbon Steel Lap Joint Flanges?
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