API 6A Standard spacer spool and drilling spool 1. Standard: API 6A 2. Pressure:2000PSI-20000PSI 3. Size: 3 1/8"--26 3/4" Drilling spool,in accordance with API 6A, have end connectors of the same size, rated working pressure and design. Drilling spool is wellhead sections which have no provision for suspension of tubular members and which may have no provision for sealing of tubular members We manufacture the drilling spool in all sizes and pressure ratings suitable for Well Head extension, B.O.P. spacing, and Choke,Kill,and Production Manifold applications. spacer spool usually has the same nominal end connections. drillingspool identification consists of naming each end connection and the overall length (outside of end connection face to outside of end connection face). Characters: 1)Made from high-strengh alloy and processed specially with heating treatment. 2)Designed and manufactured with reference to API 6A technical specifications. 3)Fit for Hydrogen sulfide H2S resistant service, manufactured with reference to NACEMR-0175 technical specifications. 4)Top & bottom connections and outlets per customer design requirements by either flanged or clamp connections. 5)All stell tanks are welded with staintess stell for long-term anti-corrosion. 6)Used for high-pressure drilling, in conjunction with flat valve for preventing blowout and connecting BOP.