T/CI 057-2022 Abolished Group standards

T/CI 057-2022 High-strength bolt connection pairs for steel structures

Publish Date: 2022-09-14 Implement Date: 2022-09-14 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Price: $ 20.00

Out of stock

Basic Information

Standard Code: T/CI 057-2022

Standard Type: Group standards

Standard Status: Abolished

is_force_gb: no

CCS Name: -

ICS Name: Bolts, screws, and studs

Publish Date: 2022-09-14

Implement Date: 2022-09-14

Scope

Scope: This document specifies the terms and definitions, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage for high-strength bolt connections with hexagonal heads of thread sizes M 12 to M 36 and torsion-shear high-strength bolt connections. This document is applicable to high-strength bolt connections with friction joints used in industrial and civil buildings, boiler steel structures, tower and mast steel structures, lifting machinery, and other steel structures. Main technical contents: 4.1.4 The basic dimensions of ordinary threads shall comply with the provisions of GB/T 196 for coarse-tooth ordinary threads. The tolerance zone for bolt threads shall be 6g according to GB/T 197, and the tolerance zone for nut threads shall be 6H according to GB/T 197. The tolerance zone for non-electrolytic zinc flake coated threads shall be in accordance with the provisions of GB/T 5267.2. 4.1.5 Before heat-dip galvanizing, the tolerance zone for bolt threads shall be 6g according to GB/T 197, and the tolerance zone for nut threads shall be 6AZ according to GB/T 22028. After heat-dip galvanizing, the tolerance zone for threads shall be in accordance with the provisions of GB/T 5267.3. 4.1.6 Other dimensions and geometric tolerances. The other dimensions and geometric tolerances of bolts, nuts, and washers shall comply with the provisions of GB/T 3103.1 and GB/T 3103.3 for Class C products. 4.2 Mechanical properties 4.2.1 Mechanical properties of bolts 4.2.1.1 The manufacturer shall take samples of the materials used to manufacture bolts, subject them to the same heat treatment process as that used in bolt manufacturing, and then make test pieces for tensile testing. The results shall comply with the provisions of Table 5. When the diameter of the bolt material is ≥16 mm, a low-temperature impact test shall also be conducted, and the results shall comply with the provisions of Table 5.