1.  Appearance and specification: 

Appearance quality is determined by using visual methods; product specifications and dimensions should be measured with a vernier caliper or tape.

2. Physical properties of rubber:

1). Rubber tensile strength, elongation at break is measured according to the provisions of GB/T528.

2). Rubber hardness is measured according to the provisions of GB/T531.

3). Rubber brittle temperature test should be measured according to the provisions of GB/T1682.

4) Adhesive strength of rubber and fabric should be measured according to the provisions of GB/T532.

5). Rubber hot air aging test according to the provisions of GB/T3512.

6). Acid and alkali resistance test of rubber should be conducted according to the requirements of GB/T1690.

3. hydraulic and vacuum tests of finished Flexible Rubber Expansion Joints:

1). Hydraulic test of finished Flexible Rubber Expansion Joints should be conducted according to the provisions 6.3 of GB/T5563.

2). Vacuum test of finished Flexible Rubber Expansion Joints should be conducted according to relevant provisions of Chapter 2-5 of GB/T5567.

4. Displacement performance tests of finished Flexible Rubber Expansion Joints: 

Displacement performance test should be conducted in accordance with Appendix A.

5. Shape and position of reinforcement bead: 

Shape and position of rubber joint end surface reinforcement bead should be inspected with the X-ray fluoroscopy tests.

6. Test of water quality through Flexible Rubber Expansion Joints:

Test of water quality through Flexible Rubber Expansion Joints should be conducted by the provisions of GB/T5749 and GB/T17219.

Our Advantages:

1. Qualified Joint Supplier in Nuclear PowerPlant  

2. China National Standards Drafting Unit of RubberJoint

Henan Liwei Industry Co., Ltd

ADD: No. 68, Mengjin Road, Shangjie District,

Zhengzhou, Henan, China Postcode: 450041

Email: maggie.liweigroup@gmail.com

WEB:

Tel: 0086-371-67447999

Fax: 0086-371-67447888

Mob: 0086-18738188461

Skype: maggie.liweigroup

QQ: 2521358770