Milk milk tanker is also called milk tanker and liquid food tanker. The tank body is made of food grade stainless steel. The outside of the tank body needs insulation layer to prevent the milk from deteriorating. The inside of the tank body is required to be smooth and clean, and no acute angle is needed. Generally it needs to be in each milk. Add cip (cleaning device) in the cabin. The top of the tank is provided with a vent valve, and the automatic adjustment is started to reduce the evaporation loss of the liquid and prevent the deformation of the liquid filling body when the positive and negative pressures are generated in the tank. An electrostatic grounding plate may be provided according to the needs of the transportation medium. Add fireproof cover to prevent accidental traffic accidents due to static electricity and Mars; the amount of residual liquid in the tank is small, which meets the requirement of less than 1% of the national standard; more optional components; optional flowmeter, level gauge, safety lock Device, anti-spill device, etc. A variety of configurations, a variety of options to meet market demand. Fresh milk transporter conversion configuration: The tank structure is divided into insulation layer protection layer, insulation layer and tank three layers. one. The tank body can be made of food grade 304 stainless steel. The tank body can be made into 2-3 tanks. Each milk tank is provided with a washer inside a cip (cleaning device) tank. Second, the middle of the tank is a thermal insulation layer, which has a thermal insulation effect to prevent the fresh milk from deteriorating. The 30-degree temperature difference does not exceed 1 degree in 24 hours. Insulation material is 80 (mm) thick polyurethane foam insulation. Third, the outer layer of the can (insulation layer protection layer) uses 2mm 304L stainless steel plate. The outer skin and trunk of the stainless steel are beautifully shaped. The whole body is beautiful in appearance, scientific in structure, light in weight and good in strength. Fourth, there is a separate discharge port (self-flow port) and feed port (tank port) in each single-chamber. Fifth, optional refrigerator, rock wool insulation, exhaust gas circulation heating, install stainless steel pump, so that the vehicle has a suction function. Before March 1, 2012, the provincial department of industry and informationization shall, together with the traffic management department of the public security organ, complete the investigation of large and medium-sized vans that have not yet been manufactured or have been manufactured but have not been sold in accordance with national standards and relevant regulations. . The Ministry of Industry and Information Technology pointed out that recently, serious and severe road traffic accidents have occurred frequently. From the analysis of accident investigations, there are management and operational problems such as overcrowding, overspeeding, illegal loading, and fatigue driving, as well as the safety technical performance problems of large and medium-sized passenger trucks. The Ministry of Industry and Information Technology put forward clear requirements for the safety configuration of trucks. “Dangerous goods transport vehicles and trucks with a total mass of more than 12 tons shall be equipped with retarders or other auxiliary braking devices. The dangerous goods transport vehicles shall be equipped with a speed limiting device, and the maximum speed setting for speed limiting devices shall not exceed 80 kilometers. Wheels should be equipped with disc brakes; Trucks with a total mass of more than 12 tons and trailers with a length of more than 8 meters shall be provided with tailgate signboards that comply with national standards. Vans and van trailers shall be equipped with reflective body-reflector markings that comply with the requirements. All trucks shall be sprayed with total quality parameters on both sides of the cab, semi-trailer tractors with maximum allowable traction quality parameters, and the height of the rails shall be applied to the trucks and dump trucks. Tank cars and trailers shall also be in tanks. The height of the sprayed can body and the types of items allowed to be shipped, font height is not less than 80 mm. â€
Longitudinal Pipe is a Steel Pipe, weld steel pipe means parallel to the longitudinal pipe. Classified by the wall thickness of thin-walled and thick-walled straight seam pipe straight seam pipe; according to shape classification round pipe, square shaped tube or pipe; there are generally classified by use pipe, galvanized pipe, oxygen blowing pipe, wire casing, metric pipe, roller tube, deep well pump tube, automotive tube, transformer tube, welding thin-walled tube, welding shaped tube and spiral welded pipe.Straight tube refers to weld and pipe longitudinal parallel. Generally known as welded pipe or pipe. The Straight Pipe is through the high frequency welding strip steel coiling unit will be of certain specifications and with longitudinal welded. Straight pipe specifications with nominal diameter, the wall thickness can be divided into thin-walled straight tube and a thick wall straight seam pipe two. According to the shape can be divided into round, square or shaped tube, etc..
Classification of welded pipe materials and uses
GB/T3091-1993 (galvanized Welded Steel Pipe for low pressure fluid delivery). Mainly used for conveying water, gas, air, oil and heating hot water or steam and other generally low pressure fluid and other use pipe. Its representative material Q235 grade a steel.
GB/T3092-1993 (galvanized welded steel pipe for low pressure fluid delivery). Mainly used for conveying water, gas, air, oil and heating hot water or steam and other generally low pressure fluid and other use pipe. Its representative material is: Q235 grade a steel.
GB/T14291-1992 (mineral fluid transport welded steel pipe). Mainly used in mine air pressure, drainage, gas drainage shaft with a straight seam welded steel pipe. Its representative material B, Q235A grade steel. GB/T14980-1994 (large diameter welded steel pipe for low pressure fluid delivery). Mainly used for conveying water, sewage, gas, air, heating steam and other low pressure fluid and other purposes. Its representative material Q235 grade a steel.
GB/T12770-1991 (stainless steel welded pipe for mechanical structure). Mainly used in machinery, automobiles, bicycles, furniture, hotels and hotel decoration and other mechanical components and structural parts. Its representative material 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, etc..
GB/T12771-1991 (fluid transport with stainless steel welded pipe). Mainly used for conveying low pressure corrosive medium. Representative material for 0Cr13, 0Cr19Ni9, 00Cr19Ni11, 00Cr17, 0Cr18Ni11Nb, 0017Cr17Ni14Mo2, etc..
Photo of our Longitudinal Pipe:
The straight tube is mainly used in tap water engineering, petrochemical industry, chemical industry, electric power industry, agriculture and city construction. For liquid conveying: water supply, drainage. Gas, steam and liquefied petroleum gas for gas transmission. Used as a pile driver, as a bridge; pier, road, building structure, etc..
welding
Straight seam pipe generally high-frequency welding, high frequency welding is a kind of induction welding (or pressure contact welding), it does not need to weld filler, weld spatter, welding heat affected zone is narrow, beautiful welding molding, welding, the advantages of good mechanical performance, so in the production of steel by wide application. According to the principle of electromagnetic induction and the exchange charge in the conductor tends to skin effect and proximity effect and eddy current heat effect, the edge weld steel local heating to a molten state, through the roller extrusion, the butt weld the intergranular bonding, so as to achieve the purpose of seam welding, cooling after the formation of a strong straight seam welding.
Weld gap
Will strip into the welded pipe unit, by the multi-channel roller rolling, strip gradually rolled up, forming the opening gap circular tube billet, adjusting the extrusion roller pressure, weld gap control in 1 ~ 3mm, and the weld ends flush. If the gap is too large, resulting in a reduction in the proximity effect, the eddy heat is insufficient, the welding seam between the poor bonding and produce no fusion or cracking. Such as the gap is caused by proximity effect increases, large welding heat, resulting in weld burning, or weld by extrusion, rolling form the pit affecting weld surface quality.
welding temperature
Low carbon steel material, welding temperature control in 1250~1460 C, can meet the pipe wall thickness 3~5mm welding penetration requirements. Welding temperature is mainly controlled by adjusting the high frequency eddy current heat power and welding speed. When insufficient heat input by heating the weld edge is not up to the welding temperature, metal structure remains solid, the formation of fusion or incomplete penetration; when the heat input is too large, heating the weld edge over welding temperature, burn off or droplet, molten hole can be formed in the weld.
standard
Straight pipe generally use the GB/T3091-2001 and GB/T9711.1-1997 standard.
Texture of material
Straight seam pipe commonly used material Q235A and Q235B and 16Mn, 20#, Q345, L245 and L290, X42, X46, X70, X80, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb.
Quality testing
According to the standard of GB/T3091-2001 "welding steel pipe for low pressure fluid delivery", the surface quality of the steel pipe should be smooth, and there are no defects such as folding, cracking, delamination and lap welding. Steel tube surface allow a slightly less than wall thick negative deviation from scratch, scratch, joint dislocation, burns and scar defects. Allow the weld thickness and welding reinforcement.
Straight pipe should be made mechanical performance test and flattening test, flaring test, and to meet the requirements. Steel pipe should be able to withstand a certain internal pressure, if necessary, 2.5Mpa pressure test, to maintain a minute without leakage. Eddy current testing is allowed to replace hydrostatic test.
Eddy current testing according to GB/T7735-2004 "eddy current testing method of steel tubes" standard implementation. Eddy current testing method is the probe is fixed on the machine frame, inspection and weld maintain 3 ~ 5mm distance, rely on the rapid movement of the steel tube on the weld of comprehensive scanning, detection signal by eddy current flaw detector, automatic processing and automatic sorting, to inspection. After the inspection, the welded pipe is cut off by the specified length, and is off the assembly line. The pipe ends shall be chamfering, marking, finished tube hexagon binding package factory.
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