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GB 50754-2012 English PDF

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US$1239.00 · In stock
Delivery: <= 8 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB 50754-2012: Code for design of steel pipe extrusion engineering
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB 50754-2012	1239	Add to Cart	8 days	Code for design of steel pipe extrusion engineering	Valid

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Basic data

Standard ID: GB 50754-2012 (GB50754-2012)
Description (Translated English): Code for design of steel pipe extrusion engineering
Sector / Industry: National Standard
Classification of Chinese Standard: P73
Classification of International Standard: 77.010
Word Count Estimation: 56,531
Quoted Standard: GB 50116; GB 50406; GB 50414; GB 5083; GB 12348; GB 18871; AQ 2003
Regulation (derived from): Bulletin of the Ministry of Housing and Urban No. 1264
Issuing agency(ies): Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Summary: This Chinese standard applies to new construction, renovation and expansion of the extruded pipe engineering design.

GB 50754-2012: Code for design of steel pipe extrusion engineering

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
1 General 1.0.1 In order to standardize the design of extruded steel pipe engineering projects, promote the improvement of my country's extruded steel pipe technology and equipment level, and ensure the quality of the project, this specification is formulated. 1.0.2 This code is applicable to the engineering design of extruded steel pipes for new construction, reconstruction and expansion. 1.0.3 Extruded steel pipe projects for new construction, reconstruction and expansion shall fully implement the national industrial development policy and implement the guidelines of high quality, high efficiency, energy saving and environmental protection. 1.0.4 The engineering design of extruded steel pipes shall not only comply with this specification, but also comply with the current relevant national standards. 2 terms 2.0.1 Expanding The process of using tools to expand the existing small inner hole of the steel billet to the inner hole required for extrusion production. 2.0.2 Piercing Put the solid billet into the perforated cylinder and use the upsetting rod to upset the billet to fill the perforated cylinder, and then use the tool to punch a through hole with the required inner diameter in the center of the solid billet. 2.0.3 Extruding The steel pipe billet is placed in a container composed of an extrusion cylinder, an extrusion die, a mandrel and an extrusion pad, and the extrusion force is exerted by the extrusion rod to force the metal to flow out along the gap formed by the extrusion die and the mandrel, thereby extruding A method of producing steel pipes. 2.0.4 Unit mill set In order to complete the products specified in the product outline, all process equipment from raw material preparation to finished products. 2.0.5 annual necessary production time of mill set The actual production time required to complete the annual output specified in the product outline. 2.0.6 Duty ratio of mill set The percentage of the unit's annual actual working time to the unit's annual effective working time. 2.0.7 online on line Compared with a certain process of the continuous operation of the extrusion production line, the workpiece can reach the process from the extrusion production line or from the process to the extrusion production line without the help of lifting and transportation equipment and human transportation. 2.0.8 manual inspection visual examination The method of observing the inner and outer surfaces of steel pipes with the naked eye or with the help of low-power magnifying glasses, endoscopes and other simple tools to find defects on the inner and outer surfaces of steel pipes. 2.0.9 nondestructive inspection The general term for methods of detecting defects without compromising the performance and integrity of the inspected material or finished product. 2.0.10 Ultrasonic inspection A non-destructive testing method that utilizes ultrasound to detect internal and surface defects in materials. 2.0.11 eddy current inspection It is a flaw detection method that generates eddy current in a conductive test piece and detects the change of eddy current to detect defects. 2.0.12 on line solution treatment on line solution treatment A heat treatment method that uses the waste heat of extruded steel pipes to rapidly cool to obtain a supersaturated solid solution.

3 Basic Regulations

3.0.1 The name of the extrusion unit should be expressed as "×××MN extrusion unit". Among them, "×××" should represent the nominal extrusion force of the extruder. 3.0.2 Extrusion machine should choose the specifications in Table 3.0.2. 3.0.3 The working system of the extrusion unit should be designed according to the continuous working system. 3.0.4 The annual effective working time of the extrusion unit should not be less than 5000h, and the annual actual working time should not be less than 4000h. 3.0.5 The load rate of the extrusion unit should not be lower than 80%. 3.0.6 The extruded steel pipe project should be equipped with glass mat processing facilities, and the facilities should meet the processing needs of glass mats of various specifications for the extrusion unit. 3.0.7 The extruded steel pipe project should be equipped with physical and chemical inspection facilities, and the facilities should meet the inspection requirements of product standards. 3.0.8 The source, repair and assembly of the production tools and molds should be specified during the design. 3.0.9 The processing or repairing equipment for special-purpose production tools and molds shall carry out capacity calculation in the design, and the processing capacity of special-purpose production tool and mold processing equipment shall be able to meet the needs of the unit.

4 ingredients

4.1 Horizontal extrusion 4.1.1 The raw material for horizontal extrusion can be cast billet, rolled billet and forged billet, and the cross section of the billet should be round. 4.1.2 The chemical composition, height structure, etc. of raw materials shall comply with the current national regulations on steel pipe product standards. 4.1.3 There should be no defects such as folds, ears, cracks and shrinkage cavities on the surface and inside of raw materials. 4.1.4 The overall dimensions should meet the extrusion process requirements. 4.2 Vertical Extrusion 4.2.1 The raw material for vertical extrusion can be solid round steel ingot, polygonal steel ingot or hollow billet. 4.2.2 Technical requirements such as chemical composition of raw materials shall comply with current national regulations on steel pipe product standards. 4.2.3 Hollow blanks should be selected in the following situations. 1 Extrusion of hard-to-deform metals. 2 Extruded thin-walled tubing. 3 Extrusion of rare metal tubing that sticks very easily to piercing needles. 4 Use an extruder without a separate piercing unit. 4.2.4 There should be no defects such as heavy skin, scars, cracks, shrinkage cavities, etc. on the surface and inside of raw materials. 4.2.5 The outer diameter specification of the raw material should match the inner diameter of the billet cylinder.

5 production process

5.1 Horizontal extrusion 5.1.1 The horizontal extrusion production process shall include raw material preparation, extrusion forming, steel pipe finishing, steel pipe heat treatment and product inspection. 5.1.2 Raw material preparation should include straightening, peeling, sectioning, drilling, end face processing and manual inspection and grinding processes, and other processes can be added according to the requirements of product varieties. 5.1.3 Extrusion forming should include billet cleaning, billet heating, descaling, reaming lubrication, piercing or reaming, descaling, secondary heating, extrusion lubrication, extrusion, cooling and collection processes, which can be added according to product varieties other processes. 5.1.4 Steel pipe finishing shall include straightening, sawing to length, pipe end treatment, internal and external surface treatment of steel pipes, weighing, spraying labels, printing and packaging processes, and other processes may be added according to product varieties. 5.1.5 Heat treatment can adopt on-line solution treatment, off-line solution treatment, normalizing plus tempering treatment, annealing treatment and other heat treatment methods. 5.1.6 Product inspection shall include non-destructive flaw detection, internal and external surface inspection, and external dimension inspection, and other procedures may be added according to product varieties. 5.2 Vertical Extrusion 5.2.1 The vertical extrusion production process shall include raw material preparation, extrusion forming, steel pipe finishing, steel pipe heat treatment and product inspection. 5.2.2 Raw materials should adopt hot delivery and hot charging process. 5.2.3 Raw material preparation should include surface cleaning and riser cutting. 5.2.4 Extrusion forming shall include heating, descaling, lubrication before piercing, upsetting and piercing, descaling, lubrication before extrusion, extrusion and cooling, and other procedures may be added according to product varieties. 5.2.5 Steel pipe finishing shall include shot blasting on the outer surface, shot blasting (shot blasting) on the inner surface, straightening, end face processing, inner and outer surface processing, weighing, spray labeling, printing and packaging processes, and other processes may be added according to the product variety. 5.2.6 Heat treatment can adopt annealing, normalizing, normalizing plus tempering, solution treatment and other heat treatment methods. 5.2.7 Product inspection shall include non-destructive flaw detection, internal and external surface inspection, and external dimension inspection, and other procedures may be added according to product varieties.

6 devices

6.1 Horizontal extrusion unit 6.1.1 The steel pipe horizontal extrusion unit shall have the basic automatic control of the whole line. 6.1.2 Long blank straightening process can choose hydraulic straightening equipment or mechanical straightening equipment, straightening equipment should be equipped with billet turning device. 6.1.3 The peeling process can choose a long-scale peeling machine or a short-scale peeling lathe. The choice of peeling machine should meet the following requirements. 1 Processing dimensions shall cover all stock diameters and lengths. 2 The diameter tolerance and surface roughness after processing should meet the extrusion requirements. 3 There should be no defects affecting the extruded product on the surface after processing. 6.1.4 For the sawing process of raw materials, a band saw or a circular saw should be selected. 6.1.5 The drilling process should be equipped with special machine tools capable of drilling and boring through holes. 6.1.6 CNC lathes should be selected for end face processing. 6.1.7 A continuous cleaning machine should be selected for billet surface cleaning, and billet drying equipment should be equipped after cleaning. 6.1.8 It is advisable to choose ring heating furnace plus induction heating furnace equipment for billet heating process, or choose separate induction heating furnace equipment, and the equipment should meet the following requirements. 1 The annular heating furnace should meet the temperature requirements for preheating the extrusion billet in the production process. 2 Induction heating furnace can choose power frequency induction heating furnace or frequency conversion induction heating furnace. 3 The induction heating furnace should ensure that the heating temperature of the billet meets the requirements of hole expansion and extrusion. 4 The dimensions and specifications of the induction heating furnace should meet the requirements of hole expansion and extrusion dimensions. 6.1.9 A vertical reaming machine should be selected for the reaming process, and the selection of equipment should meet the following requirements. 1 The hole reaming machine should have the function of reaming, and it can also have the function of piercing. 2 The maximum hole expansion force (perforation force) should be able to meet the needs of product production. 3 The inner diameter of the reaming cylinder should correspond to the diameter of the billet. 4 There shall be no cracks or pits on the surface of the tube blank after reaming. 5 The reaming process should be equipped with an electric furnace to preheat the tooling. 6.1.10 A hydraulic descaling machine should be selected for the descaling of the billet surface, and the descaling pressure should not be lower than 12MPa. 6.1.11 A glass powder lubricating device should be installed on the inner and outer surfaces of the billet before hole expansion and extrusion. The lubrication device for the inner and outer surfaces of the billet shall meet the following requirements. 1 The outer surface of the billet should be coated with glass powder for lubrication, and the platform roller coating equipment should be selected. 2 Before reaming, the surface lubrication of the inner hole of the billet should be equipped with an automatic manipulator and glass lubricant, or a manual method can be selected. 3 For the lubrication of the inner surface of the billet before extrusion, it is advisable to choose the equipment of manipulator and glass powder. 6.1.12 The selection of extruder equipment should meet the following requirements. 1 The transmission medium of the extruder should use oil, and water can also be used. 2 The maximum extrusion force should meet the requirements of product extrusion. 3 The inner diameter of the extrusion cylinder should correspond to the diameter of the billet. 4 Extrusion tools should have a quick replacement function. 5 The inner wall of the extrusion cylinder should be equipped with an automatic cleaning device. 6 The mandrel should be equipped with a cooling device. 7 The extrusion cylinder should be equipped with a preheating device and a cooling device. 8 The tool and mold should be equipped with a preheating device. 6.1.13 The steel pipe extrusion unit can be equipped with equipment capable of extruding profiled materials and special-shaped tubes. 6.1.14 The discharge roller table must be equipped with a safety protection cover, and the strength of the safety protection cover must ensure that the mandrel and steel pipe will not rush out of the safety protection cover in the event of an accident in the steel pipe extrusion machine. 6.1.15 The steel pipe cooling process should be equipped with quenching tanks and collecting devices, and cooling beds or online spraying devices can also be installed. 6.1.16 Roller hearth heat treatment furnace should be selected as heat treatment furnace in extrusion workshop, and car bottom type furnace and chamber type furnace can also be added. 6.1.17 The straightening process should be equipped with a roller straightening machine, and a pressure straightening machine can also be added. When producing profiled materials, a stretching straightening machine should be equipped. 6.1.18 The selection of sawing process equipment should meet the following requirements. 1 Sawing equipment should have the function of cutting to length. 2 Sawing equipment should be equipped with deburring equipment. 6.1.19 Abrasive belt grinder should be selected for steel pipe external surface grinding, and wet grinding should be used for external grinding. 6.1.20 The inner surface grinding equipment of steel pipes shall meet the following requirements. 1.It should have the function of grinding the inner surface of the steel pipe for the entire length. After grinding, the inner surface of the steel pipe should be free from defects such as scratches and pits. 2 The grinding wheel grinding machine should be equipped with dust removal equipment. Dust generated during grinding is strictly prohibited to be discharged directly. 6.1.21 Pickling equipment should be used to remove scale on the inner and outer surfaces of steel pipes, and shot blasting and pickling equipment can also be configured at the same time. The equipment shall comply with the following regulations. 1 When configuring shot blasting equipment, dust removal equipment should be configured. 2 Pickling equipment must be equipped with acid mist collection and treatment devices. 3 Pickling equipment must be equipped with acid wastewater collection and treatment facilities. 4 Pickling equipment must be equipped with a waste acid collection system. 6.1.22 Ultrasonic flaw detection and eddy current flaw detection devices shall be equipped in the non-destructive testing process, and other non-destructive testing equipment may also be added. 6.1.23 The ultrasonic flaw detection equipment should have the function of thickness measurement, and the flaw detection equipment should have the functions of defect marking and recording. 6.2 Vertical extrusion unit 6.2.1 The ingot cutting riser equipment can choose flame cutting machine or sawing machine. 6.2.2 Raw material grinding should be equipped with steel ingot grinding machine, and the grinding machine should meet the following requirements. 1 Grinding of cold and hot steel ingots is possible. 2 Flame-cut surfaces of ingots can be ground. 3 The upper surface and side surface of the hollow blank can be ground. 4 The grinding wheel grinding machine should be equipped with dust removal equipment, and the dust generated during grinding is strictly prohibited to be discharged directly. 6.2.3 The heating equipment can be car bottom furnace, chamber furnace or ring furnace. 6.2.4 The high-pressure water descaling device should choose a hydraulic descaling machine, and the descaling water pressure should not be lower than 18MPa. 6.2.5 As for the lubrication equipment before piercing and extrusion, a device with the function of spraying glass powder on the inner and outer surfaces at the same time can be selected. 6.2.6 A vertical punching machine should be selected for the reaming (punching) process, and it should meet the following requirements. 1 The piercing machine should have the functions of upsetting and piercing. 2 The maximum upsetting force should be able to meet the needs of product production. 3 The inner diameter of the perforated cylinder should match the specifications of the steel ingot. 4 There must be no serious cracks or pits on the inner and outer surfaces after perforation. 5.The equipment should be equipped with a matching operating machine. 6.The equipment should be equipped with tool cooling and cleaning device. 7 The reaming (piercing) process should be equipped with tool and mold preheating equipment and mold replacement devices. 6.2.7 The selection of vertical extruder equipment should meet the following requirements. 1 The transmission medium of the extruder should use oil, and water can also be used. 2 The maximum extrusion force should meet the requirements of product extrusion. 3 The inner diameter of the extrusion cylinder should correspond to the diameter of the billet. 4 The extruder should be equipped with a matching manipulator and tube billet overturning device. 5 The mold should be equipped with cooling cleaning device and preheating equipment. 6 Tool and mold should be equipped with special replacement device and special lifting equipment. 6.2.8 Car bottom furnace can be selected as heat treatment furnace. 6.2.9 The internal and external surface shot blasting (shot blasting) machine shall be equipped with dust removal equipment, and the dust generated during shot blasting shall not be discharged directly. 6.2.10 Straightening process can choose pressure straightening machine. 6.2.11 A boring machine can be selected for processing the inner surface of the steel pipe, and an external cylindrical lathe, dry grinding wheel cylindrical grinder or wet grinding wheel cylindrical grinding machine can be selected for processing the external surface of the steel pipe. When choosing a dry grinding wheel cylindrical grinder, the following requirements should be met. 1.It should have the function of grinding the entire length of the outer surface of the steel pipe. After grinding, the surface of the steel pipe should be free from defects such as scratches and pits. 2 When grinding wheels are selected for cylindrical grinding machines, dust removal equipment should be equipped, and the dust generated during grinding is strictly prohibited from being discharged directly. 6.2.12 The workshop should be equipped with......

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Question 1: How long will the true-PDF of GB 50754-2012_English be delivered?

Answer: Upon your order, we will start to translate GB 50754-2012_English as soon as possible, and keep you informed of the progress. The lead time is typically 5 ~ 8 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB 50754-2012_English with my colleagues?

Answer: Yes. The purchased PDF of GB 50754-2012_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.