Question 1

Which fitting standard applies to BQ 516 Gr.70 Fittings?

Accepted Answer

Stainless fittings often follow ASTM A403 / related project practice; duplex may cite A815; nickel-alloy buttweld fittings often cite ASTM B366 / ASME SB366 when named. State the governing designation with fitting type, NB × schedule and ends on the RFQ.

Question 2

Elbow, tee, reducer — do I order from this hub?

Accepted Answer

This hub owns the grade × fittings commercial intent. Use linked type pages when your RFQ is type-primary; otherwise list each fitting type and size here so continuity with the pipe designation stays clear.

Question 3

Can I mix stainless fittings onto a nickel-alloy line?

Accepted Answer

Not without written engineering acceptance. Fitting chemistry should match the line-class designation end to end on coded jobs.