Basic Questions about the steel barrel (Two)

Third, the steel drums of the technical requirements and selection

1, the level of performance: steel drums performance is divided into I, II, III level. The performance of the steel drum is the main technical parameters of the steel drums, steel drums performance test strength values. It can be said that the The steel drums classification drums test the level of the intensity values ​​to determine the level of the steel drums, steel drums, metal packaging container can be dressed different products, different products are not the same performance. The user can select different levels of steel drums based on product performance.

2, sheet requirements: the barrel body, the top of the barrel, the bottom of the barrel is made by the entire steel sheet, does not allow stitching.
3, welding requirements: the barrel body weld resistance welding. Seam welding of both manual and automatic, the majority of our manual seam welder. Manual seam welder anti-take the side of a wide, 8-12mm; seam welding machine automatically take the side of a narrow, 3-5mm barrel body take the side of small conducive to the curling of steel drums.

4 ribs type: the barrel body type using one of the following provisions: (1) has two ring bars; (2) at both ends with a 3-7 corrugated; (3) has two ring bars, ring bars to drum The top, ring bars to the bottom of the barrel between a 3-7 group pattern. Specifically which one to use, depending on user requirements.

5, curling Type: barrel body and the top of the barrel, the bottom of the barrel volume sealed by filling sealing packing, the type can be used the following provisions: (1) double flat curling; (2) that ends curling; (3 triple round seaming).

The steel drums curling key factors for quality of steel drums, steel drums of the same capacity specifications crimping type triple round seaming than double seamed stronger impact resistance, especially containing liquid steel drums. 200 liter small opening drums, crimping type determines the steel drum performance test intensity values. Value to achieve a performance strength of the steel drums, crimping type triple curling, it would be difficult to meet the requirements.

The steel drums curling which a type required by this section, based primarily on steel drums costumes, what kind of goods, you want to make sure that no leakage steel drums, to ensure safety in the transport and storage to select the type of steel barrel curling. Steel barrel curling to strong impact resistance and good sealing at the steel drums containing dangerous goods must ensure that the steel drums to the packaging of dangerous goods test strength index. Steel drum for holding general cargo must be properly select the type of curling, that is, to ensure the quality of the steel drums but also to avoid the phenomenon of excess packaging performance.

The curling filling sealing packing to ensure the tightness of the steel drums curling.Various types of steel drums dressed state the type of contents, liquid, solid, pasty, and so on. Different contents on the degree of crimp seal requirements are not the same. The crimping whether filling sealing packing can be determined based on the status and characteristics of the steel drum contents. In addition, the seal packing must also be compatible with the contents to adapt, or it may react leakage or contamination of the contents.

6, bung type: the top of the barrel should be based on the the opening type set closed.The purpose of the closed set in the top of the barrel is easy to open, easy to use, and to ensure that the contents do not leak. Various types of steel drums opening closed. The same opening used by the steel drum closure are also different types of models.Common bung type as follows:

(L) a small opening drums can be the following one: a, a spiral sprue closure; each one of the B, spiral injection port and the ventilation opening closed. The ventilation opening is the steel drums role to play in the sink or discharging liquid breathable, so that the pressure inside and outside the barrel. But in the domestic part of the user requirements steel drums no vents closed on the grounds that a more breathable mouth closed more than a leakage factor, and an increase in the cost of steel drums, this part of the user to mushroom Yi barrels have just one Note the entrance closed can. What kind of type, determined by the factory and user consultation.

The opening drums (2) the following can be used: a press pressure closure. Which is characterized by open and closed to facilitate sealing performance. Used for costumes paste loaded, powder and sealing requirements lax cargo, such as grease. b, the bolt tightening closed; C, screw top pressure closure. Cover to seal the item onto closed with a bolt from outside the triangle and triangle ring connection, Triangle Center. The latter two closure sealing performance, more used to hold the sealing performance requirements goods. Opening bucket of what kind of closure, plant and user based on the contents asked to select the sealing performance of the steel drums.

(3) full open barrel can be the following one: a bolt closed hoop; leveraged closed hoop.Fully opening the lid of the steel drums, also steel drums barrel top, is an integral part of the steel drums. Its closure is actually connected to the lid closed hoop and barrel body.Leveraged closed hoop than bolt-closed hoop structure complex but easy to use. Bolt-type closed hoop is more substantial. Production plant closed hoop type according to user requirements.

7, the surface coating: the inner and outer surfaces of the standard requirements of steel drums necessary coating protective layer. The steel drums appearance topcoat protective layer play a protective steel drum surface rust, durable ability to improve the steel drums and the outer surface of the steel drums to achieve aesthetic purposes. Steel drum inner surface is coated with a protective layer so that the contents are not directly in contact with the inner surface of the steel drums contents to not cause chemical and quality changes. Costumes food steel drums, the inner surface coated with a protective layer to protect the contents directly with the steel drums contact with the surface, does not affect the contents of the food hygiene standards. The outer surface of the steel drum should generally be coated with a protective layer. However, user requirements steel drum do not need to be coated with a protective layer when the outer surface can be coated with a protective layer coated with a protective layer or steel drum contents. Steel drum surface is coated with protective layer according to the characteristics and user requirements of the contents to decide.

Fourth, the performance requirements of the steel drums

The performance requirements of the steel drums, steel drums drop, stacking, airtight, hydraulic, four performance test. Four performance tests can fully prove that the steel drums as packaging containers used in the transportation, storage performance. Four trials of strength values ​​is the main technical parameters of the steel drums. Also the main basis of the assessment of structural strength and the quality of steel drums.

A small opening drums airtight test pressure value (gauge pressure): A, class I requirements to 30 kPa, the test without leakage; b, II, III level requirements to 20 kPa, the test without leakage. The contents of the small opening drums are mostly liquids, these contents steel drum having a good sealing. Inspection drums seal performance the airtight test methods to test.

2 small opening drums of hydraulic test pressure (gauge pressure): A level I require a minimum to 250kPa pressure holding five minutes without leakage; b, II, class III requires a minimum lOOkPa holding pressure five minutes without infiltration drain. Drums built to withstand vibration, shock, and the influence of the temperature rise was in the process of transportation, handling, storage, allowing the contents to produce the evaporation pressure. Therefore, the steel drum having a good pressure resistance. Commonly used hydraulic test methods to test the pressure resistance of the steel drums.

3 steel drums drop test: a class I requirements drop height of 1.8m, after falling no leakage, no cracking; B, level II requirements drop height 1.2m, no leakage after the fall, no cracking; c The Ⅲ requirements drop height of 0.8m, after falling no leakage, no cracking. Steel drums drop test is to test the strength of steel drums of the methods provide for different standards for different levels of steel drums drop height. Different types of steel drums used in the test medium, the drop is not the same criteria, the test medium is a liquid drop and there should be no leakage in compliance. The test medium is a solid, a fall without cracking qualified.

4, the steel drums stacking test: stacking height of 8m, a duration of 24 h, the test steel drums should not be likely to reduce its strength or cause instability stacking any deformation and seriously damaged. The stacking load according to a formula:

P = K × [(H-h) / h] × M × 9.8

Where: P - stacking load (N); H - stacking height (m); - one-piece steel drum height (m); - the weight of a single piece of steel drums containing items (N) ; K - coefficient of deterioration. Steel drum packing of goods in the transport and storage are the steel drums stacking storage, so use the strength of the stacking test steel drums can meet the requirements of the stacking. In order to facilitate the production plant and the stacking test, using the formula stacking height translation piles of code loads. Rigid packaging containers, steel drums provisions of the deterioration of the steel drums coefficient l.

Fifth, the quality of the steel drums requirements

Steel drum performance is a key factor of quality of steel drums, but there are other factors also affect the quality of the steel drums. Wherein the closure assembly after mass. Quality and appearance of the inner and outer protective layer of the steel drums quality, and so on.

1, closed assembly quality requirements: a \ closure is complete, a good seal assembly, and ensure interchangeability of fitting; b, small opening drums closed after assembly height is less than the volume edge port. Have good sealing closure assembly to ensure that the performance of the steel drums, the fitting of the closure should be interchangeable, if not interchangeable in the course can not guarantee the closure has a good seal, giving users a very much trouble. Small opening drums after the closure assembly height lower than the volume the edge of the mouth, its purpose is to ensure that the steel drums containing product after stacking, the closure does not withstand stacking loads, otherwise the deformation of the sealing engagement occurs at the closed barrel top , the closed sealing effect is reduced, even resulting in leakage, so it requires a height of less than roll edge port opening after the assembly of the steel drum closure.

2, steel drums inside and outside surface protective layer quality requirements: a film adhesion of not less than 2; b zinc coating thickness not less than O.OlOmm. The steel drum outer surface of the protective layer quality related to the quality of the appearance and durability capacity of the steel drums, steel drums surface protective layer related to the quality of the contents. The standards require film adhesion of not less than two, less than two film will have peeling, serve to protect the role of the steel drums, and affect the quality of the appearance of the steel drums. Based on the cooperage industry many years of experience, the thickness of the zinc layer of galvanized steel drums is generally 0.010 to 0.015mm, to meet the needs, galvanized layer is too thick will increase the cost of the steel drums. Steel drums inside and outside the protective layer using paint, coating adhesion and film.

3, the the steel drums appearance quality requirements:

(1) steel drums round, no glitches and mechanical damage, curling iron tongue. Steel drums not rounded, burrs, mechanical damage, curling iron tongue defects, not only look good, and unsafe, easily hurt. Steel drums mechanical damage will reduce the durability of the steel drums.

(2) the steel drums and clashing of not more than two, each area is not more than 0.7% of the area of ​​the barrel body.

(3) barrels are not more than two straight seam welding, welding scar formation, surface width of not more than 1 times the original weld, with a total length of not more than straight seam length 100. Welding the top of the ring bars are not allowed. Steel drum seam leakage allows welding, the welding width, length, burr formation of a direct impact on the quality of steel drums appearance. Welding method can be varied, but the effect of welding at either lower than the normal strength of the steel drums.

(4) steel drums the curling allow full circle welding, weld even. Steel barrel curling in the welding process destroyed the tightness of the seal packing, not the whole ring welding bead will produce leakage, steel drums curling welding must be full circle welding. This case is limited to the welding heat welding method.

(5) the barrel is clean, no rust, no residue and other impurities. Steel drum as a packaging container must ensure the cleanliness of the steel drums, so that the contents from contamination, in order to ensure the quality of the contents.

(6) the film is smooth, color uniformity, defects such as wrinkling and flowing.

(7) zinc layer is complete, well organized, not from layer defects blistering.

Material requirements of steel drums

1, the steel shall conform to one of the following provisions: a cold-rolled steel sheet and strip in line with the requirements of the standard GB11253; b, hot-rolled steel sheet and strip in line with the requirements of standard GB912; c, 200 liter drums hot-rolled carbon structural steel steel sheet according to the provisions of the standard GB3276; d, galvanized steel sheet and strip in line with the requirements of the standard GB2518.Preferred cold-rolled steel sheet. May choose to use performance not less than the standard requirements of the steel sheet. Steel is the main raw material for steel drums, steel shall comply with the provisions of one of the four national standards. Four national standards for steel applications, cooperage industry for many years to adapt to China's cooperage process conditions, to ensure that the steel drum performance and quality requirements. But better than hot rolled steel sheet cold rolled steel sheet. Under the conditions permit, priority should be given to the cold-rolled steel sheet. In order to promote the development of science and technology, and expand the scope of application of the steel drum material, not less than the available performance and quality standards for steel sheet.

2, gland packing sealing performance, compatible with the contents to adapt to the heat, weather, durable and anti-insoluble material. The seal packing performance should be adapted to the nature of the contents, seal packing contact with the contents without compatibility, in order to ensure the quality of the contents. Sealing filler should have a certain degree of flexibility and expansion, in order to ensure the sealing performance of the steel drums. The steel drum is a thin-walled container, seal packing to adapt to different climatic conditions, has good heat, cold and durable performance.

3, the outer surface of the coating adhesion and weatherability, good durability of the material; the inner surface of the coating material with the contents. The surface coating layer of protection to steel drums, steel drums play a protective role and a decorative role. Thus requiring the use of paint adhesion, do not fall off the protective layer of the different climatic conditions, and has good durability. The contents should not produce a chemical reaction, change, serve to protect the role of the quality of the contents. Thus, the surface of the steel drums adaptation with the contents of the paint.

4, used to hold food, food additives or drugs, gland packing and inner coating must comply with the provisions of the Food Sanitation Law and the relevant standards.Requirements of the Food Hygiene Law of the People's Republic of China food, food additives packaging and packaging materials must comply with health standards and health management approach. "Drug Administration Law of the People's Republic of China" in pharmaceutical packaging for pharmaceutical quality requirements. Steel drums used to hold food, food additives and pharmaceuticals, sealing filler and paint in steel drums used must comply with the Food Sanitation Law, the Drug Administration Law and the relevant standards.

Closure should be consistent with the requirements of the relevant supporting standards.

VII, inspection rules

1, steel drums tested by the factory quality supervision departments, and issued the certificate.

2, steel drums inspection of the factory inspection and type inspection. Factory test: the test must be carried out in the delivery of the product are collectively referred to as the factory inspection. Type test: conduct a comprehensive assessment of the quality of products, all of the technical requirements specified in the standard test (if necessary, by mutual agreement, but also increase the pilot project), known as the type of inspection.(1) factory inspection: steel drums factory inspection items are basic requirements for air tightness testing and quality requirements of three; (2) type of inspection: All the items in the technical requirements for the type test items, namely, air tightness test, hydraulic test, drop test, the stacking test.

Type test conditions: steel drums have one of the following conditions, the type of inspection should be carried out: (1) new products or old products to the plant production trial shape identification; (2) When the structure, materials, processes, change may affect product performance; (4) normal production, the half-yearly inspection; (5) long-term discontinued after the resumption of production; (5) of Quality Supervision, bodies type inspection requirements.

Steel drum sampling: determine the number of product eligibility, commonly used in two ways: (1) the product-by-test, and then test whether or not qualified to make judgments for each product called full inspection. (2) be withdrawn from the entire batch of products some products can be tested, to determine the quality of the entire batch of products through the test of this part of the quality of the product is qualified, this approach is sampling. Large quantities due to the production of steel drums, a full inspection, the inspectors of the labor-intensive, people are likely to fatigue, resulting in test miscarriage of justice, and some test items of destructive testing should not be a full inspection. The full inspection of the plant under the production process inspection as the final completion inspection, some of the projects the actual sampling. Factory inspection and type inspection specified in the standard steel drums are used method of sampling, the sampling, Sampling methods are based on the standard set of batch determination.

Steel drums logo, packaging, transportation, storage

Mark: steel drums should be at the the barrel top edge embossed logo, content requirements are as follows: a manufacturer's name or code; production years; c, plate thickness (top, bottom / body). The steel drums packaged dangerous goods or as export packaging, in accordance with the relevant provisions of embossed steel drums flag.

2, Packing: steel drum container, pallet or agreed with the user. Can also be a case-by-case basis using different methods of packaging, supply-side and need to be resolved through consultation.

Transportation: steel drum is thin-walled container, should try to avoid collision in the transport, handling, throwing and rolling. The steel drums during shipping and handling due to improper method, often steel drums bump and drop the collision phenomenon, damage the quality of the appearance of the steel drums, will seriously undermine the performance of the steel drums.

Storage: steel drums should not be stored in the open air, stacking the bottom should be set cushion. Steel drums in storagebasic-barrel-questions.html if properly maintained will damage the appearance quality of the steel drums, a serious drop shift A barrel performance. Steel drums should be stored properly safeguarded to ensure the quality of the steel drums.