... Special Equipment (pressure piping component) Manufacturing Permit and passed the ISO9001 quality control system authentication. 3 ... Titanium, Zirconium, Hastelloy, Nickel alloys, Duplex Steel and Austenitic Stainless Steel. 6.Tongpeng brand expansion joint ... power, thermal energy, water conservation, metallurgy, aviation, astronautics, ship, nuclear industry and pressure vessel and so on, 7. ...