GB/T 32076.10-2018High-strength structural bolting assemblies for preloading—Part 10: Assembly specifications (English PDF)

Foreword

GB/T 32076 "Preloaded high-strength bolted structure connection pair" includes the following parts.

--- Part 1. General requirements;

--- Part 2. Preload adaptability;

--- Part 3. HR type large hexagon bolt and nut connection pair;

--- Part 4. HV type large hexagon bolt and nut connection pair;

---Part 5. Flat washers;

---Part 6. Chamfer flat washers;

---Part 7. M39~M64 large hexagon bolt and nut connection pair;

---Part 8. Torsional shear bolts and nut joints;

---Part 9. Torsional shear type large hexagon bolt and nut connection pair;

--- Part 10. Installation technical conditions.

This part is the 10th part of GB/T 32076.

This part is drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This part of GB/T 32076 specifies the general requirements for the pre-load high-strength bolting structure connection sub-torque installation, high preload The type and composition of the bolted joints, technical conditions, storage and transportation, preloading methods and tools, installation and inspection.

This part applies to bolts and screws specified in GB/T 32076.1~32076.4, GB/T 32076.6 and GB/T 32076.7~32076.9.

Packaging, storage, construction, installation and acceptance of the connection pair consisting of the mother and the gasket.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 90.2 Fastener Marking and Packaging

GB/T 5267.2 fastener non-electrolytic zinc sheet coating

GB/T 5267.3 fastener hot dip galvanized layer

GB/T 32076.1 Preloaded high-strength bolted joints - Part 1. General requirements

GB/T 32076.2 Preloaded high-strength bolted joints - Part 2. Preloading adaptability

GB/T 32076.3 Preloaded high-strength bolted joints - Part 3. HR-type large hexagon head bolts and nut joints

GB/T 32076.4 Preloaded high-strength bolted joints - Part 4. HV-type large hexagon head bolts and nut joints

GB/T 32076.6 Preloaded high-strength bolted joints - Part 6. chamfered flat washers

GB/T 32076.7 Preloaded high-strength bolted joints - Part 7. M39~M64 large hexagon bolts and nuts

GB/T 32076.8 Preloaded high-strength bolted joints - Part 8. Torsional shears

GB/T 32076.9 Preloaded high-strength bolted joints - Part 9. Torsional shears, large hexagon head bolts and nut joints

3 General requirements

3.1 Pre-loading high-strength bolting structure The connecting sub-installation personnel shall be specially trained and certified to work.

3.2 Pre-loading High-strength bolting structure Connection sub-assemblies shall be provided by the same supplier, and different batches of connecting pairs shall not be mixed.

3.3 Preloaded high-strength bolted joints for construction by torque method (large hex head bolts and torsion shear bolts with torque method), each A set of connection pairs can only be used once and must not be reused.

3.4 Tools for installing pre-loaded high-strength bolted joints, such as torque wrenches, electric wrenches, hydraulic wrenches, etc., shall meet the construction requirements. and the calibration is qualified, the correction error is not more than ±4%, and it is used within the validity period.

3.5 The pre-load high-strength bolting structure connection should be constructed within the ambient temperature range of -10 °C ~ 40 °C. Beyond this temperature range For the work, the installation process test and assessment should be carried out before the construction, and the corresponding special construction plan should be prepared to guide the construction.

3.6 The installation personnel should have construction safety measures. Work at height should have a stable operating platform and fall protection measures to prevent injury and personnel device.

3.7 High-altitude operations are prohibited above the wind level 6 (wind speed 10m/s). Construction is not allowed in rain or snow.