The annealing temperature determines the brightness of welded steel pipe

　　The annealing temperature is the temperature parameter when the welded steel pipe is combined with the template. When 50% of the primers and complementary sequences are double-stranded DNA molecules, the temperature of Large Diameter Q235 Welded Steel Pipe is an important factor affecting the specificity of PCR. Ideally, the annealing temperature is low enough to ensure the effective annealing of primers with the same target sequence and high enough to reduce nonspecific binding. The reasonable annealing temperature range is 55-70 C. The annealing temperature is generally set at 5 C lower than that of primer Tm.

　　Annealing temperature has an important influence on the production of welded steel pipe. Whether the annealing temperature reaches the prescribed temperature or not. The heat treatment of welded steel pipes is usually solid solution heat treatment, commonly known as "annealing". The temperature ranges from 1040 to 1120 C. Welded steel pipe can be observed through the observation holes of annealing furnace that the welded steel pipes in the annealing zone should be incandescent, but not softening and sagging.

　　Next is annealing atmosphere. Pure hydrogen is usually used as annealing atmosphere. The purity of atmosphere is better than 99.99%. If the other part of the atmosphere is inert gas, the purity can be lower, but absolutely not contain too much oxygen and water vapor. Bright annealing furnace should be closed, isolated from the outside air; hydrogen as a protective gas, only one vent is open. Welded steel pipe can be used to smear cracks in each joint of annealing furnace to see if they are used up. The easiest place to run out is where the annealing furnace goes in and out of the tube. The sealing rings in this area are particularly easy to wear and tear, so they need to be checked and replaced frequently.