First, the type of flange blank:
1. Flanges cast from cast flange blanks, rough shape and size, small amount of processing, low cost, but there are casting defects (stomatal. Cracks. Inclusions); the internal streamline of the casting is poor (if it is cutting, more streamlined Poor); At present, a small number of inferior flange castings are cast. For small size castings with high dimensional accuracy, special castings such as permanent casting, precision casting, pressure casting, investment casting, and centrifugal casting can be used. The disadvantage is that such flanges are often made of "Shanxi bread iron" and are prone to leakage during use.
2. Forged Flange Blanks Forged flange blanks can be given a continuous and uniform metal fiber structure after forging. Therefore, the mechanical properties of such blanks are better, and they are often used in environments with complex forces. The precision and productivity of the free forgings are low, and they are mainly used for the manufacture of small batches and large flanges.
3. Hot-rolled flange blanks The hot-rolled flange blanks are produced by rolling the steel billet into a flat steel by a heating furnace and then coiled into a round coil by a hot coiler. It is a relatively advanced domestic flange blank production method. , Henan Changtong Technology's hot coil process compared with the traditional flange manufacturing process, has the following obvious advantages:
(1) All raw materials use standard billets, and the materials are stable and reliable;
(2), the blank flatness and ellipticity can be precisely controlled, so that the processing volume is minimized;
(3), the rough machining accuracy is high, and the machining efficiency is increased by 50%;
(4) The finished product rate is high and the material ratio reaches 1.25-1.35;
(5) Compared with the traditional process, the newly developed convex flange blank product saves about 24% of raw materials;
(6) Energy-saving and consumption-reduction. Compared with the traditional process, the new process can produce 60% of coal consumption and 40% of electricity consumption per ton of flange.
Second, the use of flange blanks:
In industrial pipelines, flange connections are used extensively. In the home, the diameter of the pipe is small and it is low pressure and the flange connection is invisible.
1. Flanges cast from cast flange blanks, rough shape and size, small amount of processing, low cost, but there are casting defects (stomatal. Cracks. Inclusions); the internal streamline of the casting is poor (if it is cutting, more streamlined Poor); At present, a small number of inferior flange castings are cast. For small size castings with high dimensional accuracy, special castings such as permanent casting, precision casting, pressure casting, investment casting, and centrifugal casting can be used. The disadvantage is that such flanges are often made of "Shanxi bread iron" and are prone to leakage during use.
2. Forged Flange Blanks Forged flange blanks can be given a continuous and uniform metal fiber structure after forging. Therefore, the mechanical properties of such blanks are better, and they are often used in environments with complex forces. The precision and productivity of the free forgings are low, and they are mainly used for the manufacture of small batches and large flanges.
3. Hot-rolled flange blanks The hot-rolled flange blanks are produced by rolling the steel billet into a flat steel by a heating furnace and then coiled into a round coil by a hot coiler. It is a relatively advanced domestic flange blank production method. , Henan Changtong Technology's hot coil process compared with the traditional flange manufacturing process, has the following obvious advantages:
(1) All raw materials use standard billets, and the materials are stable and reliable;
(2), the blank flatness and ellipticity can be precisely controlled, so that the processing volume is minimized;
(3), the rough machining accuracy is high, and the machining efficiency is increased by 50%;
(4) The finished product rate is high and the material ratio reaches 1.25-1.35;
(5) Compared with the traditional process, the newly developed convex flange blank product saves about 24% of raw materials;
(6) Energy-saving and consumption-reduction. Compared with the traditional process, the new process can produce 60% of coal consumption and 40% of electricity consumption per ton of flange.
Second, the use of flange blanks:
In industrial pipelines, flange connections are used extensively. In the home, the diameter of the pipe is small and it is low pressure and the flange connection is invisible.
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