Alloy flange

Alloy flange is also a material type of flange. Different from ordinary 20 #, Q235 and other carbon steel flanges, mainly used for special features of pipelines and pipelines, used in high temperature and high pressure positions. Its common materials are 12Cr1MoV, 15CrMo, P91, P22, 10CrMo910, etc.

The standard of implementation is national standard, chemical engineering department standard, mechanical department standard, etc.

1, according to the chemical industry norm: integral flange (IF), threaded flange (Th), plate (PL) flat welding flange, butt welding neck flange (WN), with flat welding neck flange, socket welding flange (SO) (SW), the butt welding ring loose flange (PJ/SE), flat welding ring loose flange (PJ/RJ), lining flange cover (BL (S)), flange cover (BL).

2. Standard points in petrochemical industry: threaded flange (PT), welding flange (WN), plain welding flange (SO), socket welding flange (SW), loose cover flange (LJ), flange cover (not note).

3, according to the mechanical industry norm: integral flange, butt welding flange, plate flat welding flange, butt welding plate loose flange rings, flat welding ring plate loose flange, flange ring plate loose flange, flange cover.

4, according to the national norm: integral flange, threaded flange, butt welding flange, with flat welding neck flange, socket welding neck flange, butt welding band neck loose flange, plate, flat welding flange, butt welding plate loose flange rings, flat welding ring plate loose flange, flange ring plate loose flange, flange cover.

Alloy flange production process

Aluminum alloy flange according to the drawing size before production, strict and meticulous calculation analysis, get the flange of the corresponding theoretical weight, then USES the following process: blanking - electric furnace heating -- -- -- -- -- -- -- -- -- -- -- forging - (solid) -- -- -- -- -- -- -- -- -- -- - molding - lathe processing -- - finished products.

1. Molten casting is the first process of aluminum pipe production.

A. Ingredients: according to the specific alloy number that needs to be produced, the addition quantity of various alloy components can be calculated and the raw materials can be reasonably matched.

B. Smelting: it is required to add the raw materials to melt in the melting furnace according to the process, and remove the mixed slag and gas in the melt by means of degassing and refining.

C, casting zirconium: molten aluminum in a certain casting process, through deep well casting system, cooling casting into various specifications of the round cast rod.

2. Extrusion: extruding is the means of forming the profile. First, according to the section design of the profile product, the mould is made, and the heated circular cast rod is extruded from the mold by extrusion.

3. Coloring.

A, surface pretreatment: clean the profile surface by chemical or physical method, and expose the pure matrix to facilitate the complete and compact artificial oxidation film. It can also be obtained by means of mechanical means.

B, anodization: through the surface pretreatment of the profile, under certain technological conditions, anodic oxidation occurs on the substrate surface, resulting in a dense, porous and strongly adsorbed AL203 film layer.

C, sealing hole: the pore sealing of porous oxide film formed after anodizing of anodic oxidation has enhanced the anti-pollution, corrosion resistance and abrasion resistance of the oxide film. The oxide film is colorless and transparent. It USES the strong adsorption of the oxide film in the front of the sealing hole to deposit some metal salts in the membrane hole, which can be used in many colors other than the natural color of the profile surface.

Alloy flanges are easy to appear in the pipeline during the construction process, and found that the quality of the pipe is mainly in the following aspects

Pipeline especially petroleum and chemical industry in the process of design, installation and flammable and explosive of high temperature and high pressure pipeline engineering, both from the design selection and processing manufacturing, until the construction unit and inspection of each link, the design and manufacture and installation unit personnel should strictly, ensure the selection, material, manufacture, installation and inspection of quality, otherwise the device will cause in the process of construction and production difficult si inestimable loss

1. The wall thickness of the pipe fittings is uneven

The thickness of the wall thickness of the pipe is mainly in the part of the pipe. The pipe mouth and the wall thickness of the fittings are different. Specified in the relevant state standard. Wall thickness thinning of pipe is high must not overstep its nominal thickness of 125 but the measured found at the scene, some amount of thinning to 2 o30 check for such problems, using measurement tools such as caliper, often difficult to find, at this time only can be measured using ultrasonic thickness gauge.

2. Excessive hardness

Hardness is overweight problems, mainly due to the heat treatment after forming process Its solution is to use the correct heat treatment process for an additional heat treatment. This problem can be solved generally.