Recently, the 304, 316, 1.4301, 1.4401 stainless steel hot-rolled and cold-rolled coils produced by TISCO in accordance with American and European standards have passed the PER certification of the British pressure equipment quality management system. After years of efforts, various stainless steel and carbon steel products produced by TISCO in accordance with European standards, American standards, and Japanese standards have successively passed the EU pressure equipment quality management system PED certification, and are well sold overseas. Nowadays certification is required from the designated institution to access to the UK market. In order to further meet user requirements and expand overseas markets for stainless steel, TISCO actively promotes PER certification. Related products have successfully passed PER certification and are qualified to export to the pressure equipment field in the UK. The annual supply is expected to reach several thousand tons.