First, the advantages and disadvantages of stainless steel pipe fitting is introduced
The advantages of stainless steel pipe fittings are as follows: the advantages of such as stainless steel elbow, tee, stainless steel pipe fittings due to easy to clean, beautiful appearance, does not rust and is widely used in various industries.
The disadvantage of stainless steel pipe fittings are as follows: poor heat transfer, unless for bonded aluminum or copper base, thermal conductivity is very poor. This means that a cheaper stainless steel pipe fittings are not necessarily better than other products. Price is quite high, the stainless steel cookware is very good, can last a lifetime of time, many people think that this is a one-time purchase, worth the investment.
Second, the Stainless steel pipe fittings welding technical requirements
Due to the Stainless steel pipe fittings sizes, according to the welding of stainless steel pipe fittings unique place, as far as possible reduce the amount of heat input, the manual electric arc welding, argon arc welding is adopted two kinds of methods, d > Φ 159 mm adopts argon arc welding, manual arc welding surface. D ≦ Φ 159 mm all use argon arc welding. Stainless steel pipe fittings welding technical requirements are as follows:
1, manual electric arc welding, welding machine adopts dc reverse connection, when using dc argon arc welding is pick up;
2, before welding wire should be used on the surface of the stainless steel wire brush to brush off the scale, with acetone to wash; Electrode should be in 200-250 ℃ drying 1 h, as you take;
3, the workpiece before welding groove on both sides of the 25 mm within the scope of the clean up oil pollution and so on, with acetone to wash groove on both sides of the 25 mm;
4, argon arc welding, the nozzle Φ 2 mm in diameter, extremely rich tungsten tungsten electrode, specifications Φ 2.5 mm;
5, argon arc welding of stainless steel, the back must fill argon protection, to ensure forming on the back. Using the method of partial argon filling in the pipe flow for 5-14 l/min, positive argon gas flow is 12 13 l/min.
Stainless steel pipe fittings in backing welding seam thickness should be thin as far as possible, and the roots of fusion, outstanding to into a gentle slope, arc extinguishing arc extinguishing shrinkage cavity, if any, polishing machine grinding. Must be within the groove arc arc, arc should fill arc crater and prevent the crack of arc crater.
Source: Zhejiang Yaang Pipe Industry Co., Limited (www.yaang.com)