Painting production lines such as automobiles produce a large amount of VOC using solvent coatings, as well as heavy metal problems. European automotive coatings use coating technology instead of painting. Coatings use water-based and powder coatings as much as possible, far below European emission regulations. Some advanced automotive coating lines further propose the concept of zero VOC emissions.
The surface treatment has a multi-step process of phosphating and passivation, and a heavy metal chromium passivating agent is used. Cr6+ is a carcinogen and is harmful to humans. Foreign countries have made great progress in simplifying the phosphating process and streamlining the chromizing process. The waterborne alkyd coating has been successfully applied in combination with phosphating and passivation, which not only simplifies the process, but also removes the passivating agent containing Cr6+. Epoxy primers, VOC-free acrylic latexes, air-drying varnish coatings and phosphating passivation simultaneous processes have also been developed.
It is used for the surface treatment of aluminum alloy and stainless steel for aircraft. The traditional process is phosphate phosphating, washed with water, and then passivated with dissolved hexavalent chromium salt and chromic acid mixture. After washing, it is dried and dried. Priming. The use of modified alkoxysilanes and alkoxy precursors to prepare conversion coating films by sol-gel method has also made great progress in replacing phosphating and passivation processes.
Carbon Steel Press fittings pipeline system is widely used in hot water supply, fire protection.
Compared with traditional pipeline system, it`s not only more economical, safer and healthier,
but also easier and faster for installation with longer service life.
1. Carbon Steel Press Fittings range:
Coupling -- Equal coupling, Reducing coupling, Slip coupling, coupling with male/ female threads;
Elbow -- Equal elbow, Elbow 90°, Elbow 45°, Reducing elbow, Elbow with plain end, Elbow with wall plate, and Elbow with male/ female threads;
Tee -- Equal tee, Reducing tee, Tee with wall plate, and Tee with male/ female threads;
Others-- Pipe cap, Pipe Bridge and Flange connector.
2. Material: Galvanized carbon steel, 1.0034C-Stahl,Kohlenstoffstahl, ACCIAIO AL CARBONIO.
3. Size: 3/8``-4``inch or as request, pipe wall thickness: 1.0--2.0mm
Sizes range:
DVGW W534:1995: 15, 18, 22, 28, 35, 42, 54, 76.1, 88.9, 108mm.
JIS G 3448-1980: 15.88, 22.22, 28.58, 34.00, 42.7, 48.6, 76.1, 88.9, 108mm.
4. Standard:
Press fitting standard: (DIN) DVGW W534-1995; (JIS) JWWA G116:2001; GB/T 19228.1-2003
Pipe standard: DIN10312:2003; GB/T 19228.2-2003
O-ring sealing standard: CEN EN 681-1:2006; GBT 19228.3-2003
5. O-Ring Seal: "Chlorinated butyl rubber" (CIIR), EPDM, HNBR, NBR and FKM, etc.
EPDM (black): max working pressure 16bar, working temperature from -20℃ to 120℃, Suit medium: cold and hot water, compressed Air etc.
6. Galvanization: all carbon steel pipe fittings are plated with rust-resistant zinc.
7. Anneal: all stainless steel pipe fittings are annealed in inert gases before packing.
Installation and Connection Order
Equipments And Quality Control
Orderly Workshop
Efficient Anneal Equipment
Pressure Testing
Tensile Testing
Carbon Steel M Profile Press Fittings(DVGW)
Carbon Steel M Profile Press Fittings,Carbon Steel Press Fittings,Steel Press Elbow Extension Fitting,M Profile Carbon Tee
WENZHOU KASIN VALVE PIPE FITTING CO., LTD. , http://www.kasinpressfitting.com