Full Bore Ball Valves needed in Pakistan

We have following inquiry as attached kindly quote us.

SSGC/FP/RLNG3/8105

Valves: (As per Specification)
Full Bore Ball Valves, Plug Valves, Swing Check Valves & Needle Valves, Allied Sizes:
1/2, 1, 2, 4, 6, 12, 16, 20, 24, 30, 36, 42 & 48, T/Items= 30 Nos & T/Qty=521 Nos.

(Under Single Stage Two Envelope Bidding Procedure).
Only for those Prospective Bidders having the manufacturer valid API 6D, API 6FA, API
6FD, API Spec Q1, ISO 14001: 2004 and ISO OHSAS 18001: 2007 Certificates f