| What is the Minimum Order Quantity (MOQ) for SS 316 SORF Flanges? |
As a directory, we connect you with suppliers who can accommodate various order sizes. Many of our listed partners can arrange even 1 piece of SORF Flange, while others specialize in bulk container loads. |
| Do these flanges come with a Material Test Certificate (MTR/MTC)? |
Yes, most reputable suppliers on our directory provide EN 10204 3.1 or 3.2 certificates and Raw Material Certificates to ensure quality and compliance with international standards. |
| What is the typical lead time for an order? |
Lead times vary by supplier and stock availability. Stock items can often ship within 24–48 hours, while custom-manufactured or bulk orders may take approximately 30–45 days. |
| What is the difference between SS 304 and SS 316 SORF Flanges? |
While they look identical, SS 316 contains 2–3% molybdenum, which provides superior resistance to chloride pitting and corrosion in marine or acidic environments compared to SS 304. |
| What pressure ratings are available for SS 316 SORF flanges? |
These flanges are commonly available in Class 150, 300, 600, 900, 1500, and 2500 ratings, adhering to ASME B16.5 standards. |
| When should I choose a SORF (Slip-On) flange over a Weld Neck (WN) flange? |
SORF flanges are ideal for low-pressure applications and where space is limited, as they are easier to align. Weld Neck flanges are preferred for high-pressure, high-temperature, or extreme stress environments. |
| How do you install an SS 316 SORF flange? |
The flange is slipped over the pipe and then secured with two fillet welds—one on the outer hub and one on the inner diameter of the flange—to ensure a leak-proof seal. |
| Are these flanges suitable for seawater or marine applications? |
Yes, Grade 316 is often called “marine-grade” stainless steel because its molybdenum content makes it highly resistant to salt-water corrosion and pitting. |
| How can I verify the quality of the flange surface finish? |
Check the flange face for specific finishes like Smooth, Concentric Serrated, or Spiral Serrated, as required by your sealing gasket and pressure needs. |