Stainless Steel · Flanges · ASTM A182 / ASME SA182 F316L
SS 316L Stainless Steel Flanges
In short: SS 316L flanges forged to ASTM A182 F316L are the standard flange for SS 316L piping in chemical, pharmaceutical and offshore utility systems.
- S31603
- UNS number
- 8
- density, g/cm³
- 3.1 / 3.2
- EN 10204 certificates
- 7
- SS 316L product forms
Why this combination
Why SS 316L in flanges
Weld-neck F316L flanges keep the welded joint low-carbon; dual F316/F316L flanges carry 316's B16.5 pressure ratings.
In chloride service, the gasket crevice is the weak point; SS 316L's molybdenum helps, but crevice-free design matters more.
Specification
How to specify SS 316L flanges
NPS ½" – 24" (B16.5), 26" – 60" (B16.47 Series A/B); Class 150, 300, 600, 900, 1500, 2500; EN 1092-1 PN 6 – PN 100 on request
- Specification
- ASTM A182 / ASME SA182 F316L
- UNS
- S31603
- EN / W.Nr.
- 1.4404
- Dimensions
- ASME B16.5 / B16.47; EN 1092-1 (1.4404) on request
Sizes and weights
SS 316L flanges sizes, weighed at 8 g/cm³
Other sizes on request. For general flanges information, such as manufacturing routes and end finishes, see the flanges guide.
NPS ½" – 24" (B16.5), 26" – 60" (B16.47 Series A/B); Class 150, 300, 600, 900, 1500, 2500; EN 1092-1 PN 6 – PN 100 on request
Chemistry
SS 316L composition
- UNS
- S31603
- EN / W.Nr.
- 1.4404 · X2CrNiMo17-12-2
- Density
- 8 g/cm³
- PREN
- 23 – 25
| Element | Limit, % | Why it matters |
|---|---|---|
| C | 0.030 max | |
| Mn | 2.00 max | |
| P | 0.045 max | |
| S | 0.030 max | |
| Si | 0.75 max | |
| Cr | 16.0 – 18.0 | |
| Ni | 10.0 – 14.0 | |
| Mo | 2.00 – 3.00 | |
| N | 0.10 max |
Limits per ASTM A240; other product forms and specifications differ slightly. Your order's specification and edition govern.
Questions
About SS 316L flanges
Are dual F316/F316L flanges standard?
Yes, and they meet both grade requirements.
Which facing is common?
Raised face for most process service; RTJ for high-pressure classes.
From enquiry to dispatch
How a SS 316L flanges order runs
- 01 EnquiryGrade, specification, size, quantity
- 02 ReviewChecked against your standard
- 03 InspectPMI, dimensions, TPI if required
- 04 CertifyEN 10204 3.1 / 3.2, heat traceable
- 05 ShipPacked and documented for the destination
Need SS 316L flanges?
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