In order to prevent the cold cracking after welding of ASME SA213 T5 boiler pipe, heat treatment was carried out after welding, the residual stress was eliminated, and the hardening tendency of steel was reduced.
Welding joint after external inspection, and after ASME SA213 T5 boiler pipe welding heat location. The heating speed, thermostatic time and cooling speed are controlled by computer thermostat with electric heating method, and the insulation is carried out by composite aluminum silicate fiber blanket, and the asbestos is insulated。
The process parameters of heat treatment are as follows: the heat treatment temperature of ASME SA213 T5 boiler pipe and 2 dissimilar steel joints is 750 ~ 780℃, and the heating range of ASME SA213 T5 boiler pipe heat treatment is not less than 3 times of weld width on both sides of weld. And not less than 50 mm.
The ASME SA213 T5 boiler pipe temperature rise rate is not controlled below 30℃, and the maximum temperature difference is small during the constant temperature period of 40 ~ 60 m in, under 20℃/ h at 30℃. At 50℃, the ASME SA213 T5 boiler pipe cooling rate should be lower than 250℃/ h, cooling to 30℃, natural cooling.
Katalor can supply the ASME SA213 T5 boiler pipe with high quality and good after-sale service. We are the famous steel supplier and exporter in China. So please contact us freely if you have any need in ASME SA213 T5 boiler pipe. We will reply as soon as possible and give you the best price in ASME SA213 T5 boiler pipe.
