Hot Rolled Galvanized Steel Pipe-DN25
Less than 12m
Q195 → Grade B, SS330,SPHC, S185
Q215 → Grade C,CS Type B,SS330, SPHC
Q235 → Grade D,SS400,S235JR,S235JO,S235J2
Q345 → SS500,ST52
BS EN10296,BS EN10025,BS EN10297,BS6323, BSEN10219,BSEN10217,GB/T13793-1992,GB/T14291-2006 GB/T3091-1993,GB/T3092-1993,GB3640-88
Used For Structure, Accessorize And Construction
3) Thread with Coupling or cap
1) Plastic pipe cap
2) Iron protector
2) Black Painted (varnish coating)
4) With Oiled
5) 3 PE, FBE, corrosion resistant coating
Electronic Resistance Welded (ERW )
Electronic Fusion Welded (EFW)
Double Submerged Arc Welded (DSAW)
Welded Line Type
With Hydraulic Testing, Eddy Current , Infrared Test
2) In Bulk
4) Clients' Requirements
2) Bulk carrier
Port of Shipment
Xingang Port,Tianjin, China
Date of Delivery
According To The Quantity And Specification Of Each Order
Fitting as screws and flange also can be supplied.
Q: Why should you choose us:
A: 1. More than 10 years experience in this industry
2. 100,000 tons exporting per month
3. Professional foreign trade tea
4. OEM&ODM capacity
5. High quality assured & competitive price
6. Try our best to meet your needs & save your budget
7. Very popular in Southeast Asia, Africa, Mid-East and South America etc.
8. VIP membership system, first time customers and long-term cooperation customers can get extra discount on some products.
- Q:Uses of alkali free glass fiber.
- According to the orders of reinforced material combination,the fabric surface is sill-like: Along the width of the direction of the area, the quality is uniform,twistless roving is chopped and sprayed in the net with the certain shape and distributed in the resin paste; the smooth surface make the surface of the glass steel smooth. Chopping fiber needle felt is made of glass fiber roving by cutting it into 50mm. Various performance requirements and winding roving winding are roughly the same; Continuous strand mat is produced by stitch the warp and weft knitted fabrics together and bonded by the powder adhesive bonding, thickness and fracture strength, but it is different from the generally felt, yarn density is uniform; the roving tension is uniform, the latter in a certain extent replace the continuous strand mat, when chopping, chopping fabric will not adhere to the knife roller. Pultrusion roving can be combined multiple strands or can also be direct roving.
- Q:How to prevent foil wrinkling?
- Since the rolling Aluminum often bear greater than after the order processing tension, some rolling showed only bad plate-shaped cut in the use of aluminum foil or annealed Shique showed wrinkling. The main reason is due to wrinkling produce bad shape control, including roll grinding incorrect, unreasonable control roll, rolling and cutting process parameters is unreasonable, incoming bad flatness and flatness adjustment is not correct, set or lack of precision cylindrical die.
- Q:What's the application of double-sided conductive aluminum tape?
- 1. Aluminum tape is rolled tape by compounding anti-sticking paper and quality aluminum foil which is coated with acrylic adhesive, thus featured by strong adhesion high temperature resistance and aging resistance. It is used for fixing evaporating pipes of refrigeration equipment such as air conditioner, freezer, etc. 2. By padding a layer of glass wool, it is used for thermal insulation of automobile. Generally speaking, it is the less reflective material used in air-conditioning refrigerator.
- Q:How is grade of fire endurance divided?
- Fire resisting shutter is divided into Class A / B / C, and the relevant fire endurance are not less than 1.2 /0.9 /0.6 hours, see "General technical conditions for steel fire resisting shutter GB 14102-93". 4.3 4.3.1 Classification according to time of fire resistance 4.3.1 Ordinary steel fire resisting shutter (see Table 3) Table 3 and Category Code Refractory time hF1 1.5F2 2.04.3.2 Composite steel fire resisting shutter (see Table 4). Table 4 and Category Code Refractory time hF3 2.5F4 3.04.4 Classification according to refractory time and smoke prevention performance 4.4.1 Ordinary steel fire and smoke resisting shutter (see Table 5) Table 5 category and code refractory time h smoke leakage (20Pa differential pressure) FY1 1.5 ≤0.2m3 / m minFY2 2.0 ≤0.2m3 / m min4.4.2 composite steel fire and smoke resisting shutter (see table 6) table 6 category and code refractory time h smoke leakage (20Pa pressure) FY3 2.5 ≤0.2m3 / m minFY4 3.0 ≤0.2m3 / m min Excerpt completed. Fire shutter used as fire compartment has a fire resistance of 3 hours, and fire shutter set on the upper opening part on the firewall has a fire resistance of 1.2 hours. **** Materials with fire resistance of 3.0 hours are called AAA refractory material (back fire surface). "Building Conventions" have mentioned in places where it is really difficult to set a firewall, fire shutters can be used to separate fire compratment. When using fire shutters whose back surface temperature rise is included as the judging criteria of fire resistance, its fire resistance should be not less than 3.00h; When using fire shutters whose back surface temperature rise is not included as the judging criteria of fire resistance, independent protection of closed automatic water spraying system should be set on the both sides of the shutter, and the duration of water spray should be not less than 3.00h. In summary: Fire shutter is divided into: Grade AAA, A, B and C
- Q:how about the performance of aluminum silicate fire proof thermal insulation?
- aluminum silicate refractory fiber board has following characteristics:1. the structure is more even than natural wood. it avoids rot, moth-eaten and other problems, 2. fiber board has small expansion and contraction, which is easy to be processed. 3. its smooth surface is easy to paste a variety of finishings and you can make furniture more beautiful. Decorative wood-based panel is to embellish their homes. I hope it is useful to you!
- Q:Could you tell me the fire-resisting time of class B fire proof door?
- Could you tell me the fire-resisting time of class B fire proof door?
- Q:Aluminium daily maintenance need to pay attention to what matters?
- 5.aluminum during storage, you can put on the shelf small size, large size aluminum slab storage method is best to use the skids spaced from the ground at the bottom, keeping the distance to the ground is greater than 10CM; large-sized materials stacked together , it is recommended that you use the best materials up and down wood / wood and other materials spaced.
- Q:For wall slot, is seam paper tape or anti-cracking mesh suitable for joints?
- Dacron cloth is more anti-cracking.
- Q:What kind of material is good to be laid on the kiln car, refractory brick?
- Ceramic fiber blanket
- Q:How to prevent aluminum foil from wrinkling?
- Due to the strip shape is serious bad, folding formed in the process of aluminum foil coiling or expanding. Its essence is that its tension is not enough to make the box surface flattening. For a device with the tension of 20 mpa, the box surface flatness shall not be greater than 301. When it is more than 301, it will wrinkle inevitably. Due to the rolling aluminum box often bear the bigger tension than follow-up processing, some aluminum foil that just show the bad strip shape when rolling turn to wrinkle when cutting or used after annealing. Main reasons of wrinkling are due to poor flatness controlling, including incorrect roll grinding ,unreasonable roll shape controlling, unreasonable parameter controlling of rolling and cutting process, bad incoming material strip shape and incorrect strip shape adjusting and imperfect precision of sleeve or tube core. Main reasons of wrinkles: The large amount of pressure make the rolling uneven or coiling lack tension. Improper controlling of roll shape or rolling pressure is too low; Uneven thickness of billet, bad flatness or shear wave. Winding shaft precision is not good and the sleeve is not round. Improper control of pressing roller pressure.
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