T/ZZB 1916-2020 Active Group standards

T/ZZB 1916-2020 High-voltage switchgear used hot-rolled cylindrical spiral compression spring

Publish Date: 2020-11-20 Implement Date: 2020-12-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/ZZB 1916-2020

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: \nSpring

ICS Name: Spring

Publish Date: 2020-11-20

Implement Date: 2020-12-01

Scope

Main technical content: This document specifies the basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, and quality commitments for heat-rolled cylindrical helical compression springs (referred to as springs) used in high-voltage switchgear. This document applies to springs used in high-voltage switchgear, which are formed by heat-rolling round steel rods and then subjected to quenching and tempering treatment. The dimensions of the springs are as follows. For springs exceeding these dimensions, the supplier and the buyer may consult and adopt them as reference: — Free height: ≤800 mm; — Winding ratio: 4～10; — Height-to-diameter ratio: 0.8～4; — Effective number of turns: ≥3 turns; — Pitch: ＜0.5 D; — Material diameter: 16 mm～40 mm; — Spring diameter: ≤400 mm