The thick-walled bellows expansion joints produced by our company adopt the optimised design of GB/T16749-1997 standard.Products in the domestic market to meet the demand at the same time, and exported to twenty-two foreign countries, effectively guarantee the pressure pipeline in the delivery of a variety of harmful toxic flammable and explosive media when the high safety performance, to avoid leakage of pollution caused by the sea, the sky, factories and other environmental pollution.Its products are characterised by high temperature resistance, high pressure resistance, corrosion resistance, fatigue resistance and wear resistance.