Question 1

Which flange standard and ASME class apply to Duplex 2205 Flange?

Accepted Answer

Follow the piping class on the isometric — stainless programmes often cite ASTM A182 grades; nickel-alloy programmes often cite ASTM B564 / ASME SB564 when named. ASME B16.5 / B16.47 type, Class (for example 150–2500) and face (RF/RTJ) are confirmed per RFQ — we do not invent stock Class lists.

Question 2

WNRF, SORF, BLRF or RTJ — which types can you supply?

Accepted Answer

Common ASME B16.5 type families (weld neck, slip-on, blind, socket weld, RTJ and related) are quoted when the isometric names them. Open the linked type pages where available, and list type + Class + size on the RFQ.

Question 3

What documentation is available for flange packages?

Accepted Answer

EN 10204 mill test documentation and third-party inspection are arranged when the client standard requires them — confirmed in the quotation, not assumed as free extras on every order.

Question 4

Can I substitute Duplex 2205 and Super Duplex 2507?

Accepted Answer

No. They are different grades. Use the Journal comparison for orientation, then order the exact grade on the PO.