The security door is simply a door, but its function is not ordinary. It is the first protective barrier between the family and the outside world and plays a crucial role. Therefore, the selection of security doors deserves our attention. At present, there are many brands of anti-theft doors on the market, prices are not equal, so that consumers who do not understand the brand of anti-theft doors cannot start. Here we take a look at who has the security door brand rankings and buy skills. Security door brand ranking 1, Panpan security door Heard this brand, surely everyone must have heard it. It is a relatively well-known brand in the industry and a leading company in China's security door industry. It produces a wide range of products such as fire doors, steel doors, rolling shutter doors, and indoor doors. Doors, protective windows, automatic garage doors and so on, there are more than 100 species, after more than 30 years of development, has become the domestic production of anti-theft door industry first, the market share of the first well-known brands, has a good reputation in the industry , Products are also favored by consumers. 2, Wang Li security door It is also a well-known brand, founded in 1996, the hardware capital - Yongkang. It is a comprehensive company integrating scientific research, design, manufacturing, sales, service, finance, real estate, and international trade, but it is leading. The products are anti-theft doors, anti-theft locks and other products, best-selling domestic and foreign, high-end automated production technology so that it is the only company in the industry won six gold medals, is the consumer has always been the most trusted brand. Buy security door points 1, see the certificate of conformity Qualified products are subject to testing by the testing unit, and they must have a production permit issued by the relevant department. 2, security level The most important indicators for the detection of such products are safety and they are divided into several grades. The c-class safety performance is often higher, followed by b-level, then a-level, but most of the market is a-grade, suitable for ordinary Family use. 3, lock firmness Qualified products have three or five locks. Both the lock and its crossbar can be locked and fixed at the same time, and rubber bars are embedded in the frame. When the door is opened and closed, no harsh sound will be heard. 4, process quality Observe its workmanship, whether there are welding flaws, such as slits, missing welds, etc., but also to observe whether the door and frame are compact, whether the gap is even, whether the opening is flexible, the appearance is smooth. Summary: Its quality is good or bad, and it is closely related to the family's safety. Therefore, the brands listed in the above-mentioned anti-theft door brand are all good, and consumers can use it as a reference when choosing a security door.
Precision Steel Tube are produced by Cold Drawn and Cold Rolling, with very good OD and ID tolerance and smoothness ,
with very good Concentricity, Good Ovality, Good Roundess, Less Deviation, suitable for machinery and CNC machining part, for auto parts.
Cold Drawn Seamless tubing (also known as CDS steel tube. Cold Drawn Seamless tubes offer tight tolerances compared to Hot Finished Seamless tube, and offers stronger physical properties compared to other mechanical tubing.
CDW Steel Tubes is made by drawing the ERW tubes from the tube mills through a plug and die combination, mounted on the draw bench. The end tagged and annealed tubes are drawn through a closely machined die that controls the outside diameter of the tubes. At the same time the tube passes over a plug that controls the inside diameter. Further, the manufactured tubes are processed by the downstream facilities for different industry applications.
Technical Standard according to:
ASTM A513, ASTM A519,
DIN2391, EN10305-1, EN10305-2, EN10305-4,
SAE J 524, SAE J525 etc.
Delivery Condition:
Cold Finished ( BK, C/W, without heat treatment)
Normalized (+N)
Stress Relieved Annealed (+SRA)
Steel Grade:
SAE 1010, SAE 1020, SAE 1026, SAE 4130, SAE 4140.
ST35.8, ST37.0, ST52, E235, E355, 42CrMo4,etc
Sizes:
OD: 4.0 to 350mm
WT: 0.5 to 50mm
Length: Cutting Length available, max 12000mm according to Customer PO.
Precision Steel Tube Precision Steel Tube,Hydraulic Precision Steel Tube,Precision Carbon Steel Tube,Precision Seamless Steel Tube,CDS Steel Tube,CDW Steel Tube Torich International Co.,Ltd--The Steel Tube Maker , http://www.chinasteeltubepipe.com
