Lap Joint Flanges Manufacturer
At Steel Icon Stainless Pvt. Ltd., we are a leading manufacturer and supplier of lap joint flanges, designed for systems requiring frequent disassembly, inspection, or alignment adjustment. Ideal for non-critical, low-pressure applications, these flanges offer maximum flexibility and are commonly used with stub-end fittings.
Our lap joint flanges are produced in stainless steel grades like SS 304, SS 316, SS 321, SS 410, and Duplex 2205, as per ASTM, ASME, DIN, and EN standards.
What is a Lap Joint Flange?
Lap joint flanges are slip-on style flanges that rotate freely around the pipe or stub end. The pipe is butt-welded to a stub end, while the flange floats behind. This allows for easy bolt alignment and frequent disassembly, making them ideal for systems that require cleaning or realignment.
| Products |
|---|
|
Stainless Steel Bar |
|
Fasteners |
|
Forged Products |
|
Flanges |
|
Forged Fittings |
|
Stainless Steel Billets |
|
Round Corner Square Billets |
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Stainless Steel Pipes |
|
Pipe Fittings |
|
Valve |
Lap Joint Flanges Specifications
| Property | Specification |
|---|---|
|
Material Grades |
SS 304, SS 316, SS 321, SS 410, Duplex 2205
|
|
Size Range |
½” to 24”
|
|
Pressure Ratings |
Class 150, 300, 600 |
|
Face Types |
Flat Face (FF), Raised Face (RF) |
|
Standards |
ASTM A182, ASME B16.5, EN 1092-1, DIN 2641/2642 |
|
Finish |
Machined, Pickled, Passivated |
Equivalent Grades
| Grade | UNS | EN / WNR |
|---|---|---|
|
SS 304 |
S30400 |
1.4301 / X5CrNi18-10 |
|
SS 316 |
S31600 |
1.4401 / X5CrNiMo17-12-2 |
|
SS 321 |
S32100 |
1.4541 / X6CrNiTi18-10 |
|
SS 410 |
S41000 |
1.4006 / X12Cr13 |
|
Duplex 2205
|
S31803 / S32205 |
1.4462 / X2CrNiMoN22-5-3
|
Chemical Composition
| Element | SS 304 | SS 316 |
|---|---|---|
|
Cr |
18–20% |
16–18% |
|
Ni |
8–10.5% |
10–14% |
|
Mo |
– |
2–3% |
|
C (max) |
0.08% |
0.08% |
Mechanical Properties
| Property | SS 304 / SS 316 |
|---|---|
|
Tensile Strength |
515 – 750 MPa |
|
Yield Strength |
205 – 310 MPa |
|
Elongation (%) |
≥ 30%
|
|
Hardness (HRB) |
≤ 95 |
Types of Lap Joint Flanges
- Standard Lap Joint Flanges – Used with butt-welded stub ends
- Raised Face Lap Joint Flanges – For better gasket sealing
- Flat Face Lap Joint Flanges – For cast iron or flat-face fittings
- Custom Bore Lap Joint Flanges – Made to match special stub end dimensions
Applications of Lap Joint Flanges
- Food & Pharma – Systems requiring frequent cleaning
- Water Treatment – Pipe setups with alignment adjustments
- Construction – Temporary installations and test loops
- Marine – Utility and cooling water systems
- Chemical Industry – Non-critical process piping
Frequently Asked Questions
Explore our FAQs for insights on materials, customization, and delivery.
What is the main use of lap joint flanges?
They’re used where frequent disassembly or alignment is required.
Do I need a stub end with a lap joint flange?
Yes, a stub end is essential to complete the connection.
Are lap joint flanges pressure-rated?
Yes, up to Class 600, depending on the design and material.
Can you provide custom sizes?
Absolutely. We offer custom bores and dimensions on request.
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