Posts by wilson

Residual stresses caused by uneven cooling of seamless square tubes. Residual stress is the internal self-equilibrium stress in the absence of external force. Hot-rolled steel of all kinds of cross-se...

In general 304 stainless steel tube mills polishing wheel speed of 2500m / min, the polishing considerations also used in polishing, using the polishing tape 150 to 240 to obtain a continuous hairline...

When it is necessary to produce several profiled tubes and the size of the strip used allows unification (eg several types of flat steel window tubes), only one set of profiled rolls is required and t...

Square tube quality must control the brightness after annealing. More influential factors are as follows:   1, The annealing temperature reaches the specified temperature. Stainless steel tube heat tr...

As the use of square tube deep underground, in this environment is very easy to be corroded, so much attention to the quality of the square tube without any flaws. Many shortcomings of the square tub...

1. Stainless steel tube with vertical external power supply, DC positive polarity (wire connected negative). 2. Generally suitable for 6mm thin plate welding, weld appearance, a small amount of weldin...

Butt weld elbow is formed by hot forming or forging forming elbow, and its connection is the form of butt welded directly to the pipe. Butt elbow according to its radius of curvature to points, can be...

Welded neck flange generally use forging or forging process is made. Elected with steel or steel production, it is necessary to meet the following requirements: 1. Welded neck flange should be ultraso...

① Flange pressure contact surface should be gold processing, in order to prevent welding deformation, flange contact surface depth should be recessed into h = (0.10 ~ 0.20) t, to provide the amount of...

Stainless steel flange material is usually pided into 304, 304L, 316, 321, 316L and other categories. 1, In order to prevent corrosion caused by the flange cover between the eyes, the welding current...