Testing Device for Steel Structure, Screw, Mechnical Connecting

 Main instrument of testing for steel structure:

• Nondestructive examination for quality of welding: ray, altrasonic magnetic power detection apparaturs, and osmoscope
•  Testing for antiseptic and fireproof coating: thickness gauge of paint coating
• Bearing loading of steel connections: universl testing machine
• Tensile of structural connecting and bolt, wedge loading, troque coefficient,  anti slip coefficient testing: torsion testing, universal.
• Examination of steel: universal testing machine

Relative standard:

• GB/T1231- high strength, large hexagon head bolt and nut, grommet for steel structure and technical requirement
• GB/T3632-  sets of torshear type high strength bolt hexagon nut and plain washer for steel structures
• GB/T16823.3-2010 /ISO16047：2005  fasteners—torque/clamp force testing
• DIN2510/5standard of Germany（nut）
• DIN2510/6- standard of Germany（long nut)
•   ASME/ASNIB18.2.2 standard of America（nut）
• ASTM.A320/A320M- American testing and leared society of material（technical requirement for alloy steel bolt material used at low temperature）
•  ASTM A325-American testing and leared society of material（σb≥827Mpa/724Mpa technical requirement for heat treating, structural steel bolt）
•  ASTM A354- American testing and leared society of material（technical requirement for quenched and tempered alloy steel bolt, bolt stud, and other threaded fastener）

Machine

• NDS, NDW, EZ torsion testing machine for wire material and bolt
• WAW micro computer controlling electro – hydraulic servo universal testing machine
• WES, WEW digital displaying, micro computer displaying, universal testing machine.