T/ZZB 2203-2021 Construction of manually operated stainless steel threaded ball valve
T/ZZB 2203-2021 Construction of manually operated stainless steel threaded ball valve
Basic Information
Scope
Main technical content: This document specifies the terms and definitions, types and parameters, basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, and quality commitments of manual stainless steel threaded ball valves for building use. This document is applicable to manual stainless steel threaded ball valves for building water supply and drainage with a nominal pressure of PN ≤ 4.0 MPa, a nominal size of DN ≤ 50 mm, and an operating temperature of -29 ℃ ≤ t ≤ 180 ℃ (hereinafter referred to as "ball valves"). This document is also applicable to manual stainless steel threaded ball valves used for non-corrosive, non-flammable and non-explosive gases as the working medium.