Ductile Cast Iron Pipes
STANDARDS FOLLOW:
ISO2531, ISO4179, ISO8179, ISO4633, ISO7186, EN545, EN598, BS4772 and other equivalent standards.
EFFECTIVE LENGTH: 5.5 or 5.7 or 6 meters.
WALL THICKNESS:
K9 is the normative one; we can supply K7, K8, K10, K12 if requested.
JOINT TYPE:
The normative joint are . Please contact us if other joints are required.
INTERNAL LINING:
Depending on the internal condition of use, the following linings can be applied.
Ø Cement mortar Lining: cement mortar lining as per ISO4179, cement can be Portland cement, Blast Furnace cement, Sulphate Resisting Cement, High Alumina cement according to characteristics of conveyed water
Size | Lining thickness(mm) | |
mm | nominal | min. at one point |
DN80-300 | 3 | 2 |
DN 350-600 | 5 | 3 |
DN 700-1200 | 6 | 3.5 |
DN 1400-2000 | 9 | 6 |
Ø Cement mortar with seal-coat;
Ø Polyurethane;
Ø Polyethylene;
Ø Epoxy;
Ø Bitumen Paint;
EXTERAL COATING of Ductile Cast Iron Pipes
Depending on the external conditions of use, the following coatings can be applied.
Ø Metallic Zinc with finishing layer in accordance with ISO8179-1, with a mean mass of zinc coating not less than130 g/m2
Ø Zinc-rich paint with finishing layer in accordance with ISO8179-2;
Ø Bitumen paint, with dry film thickness not less than 70 microns;
Ø Polyethylene sleeves in accordance with ISO8180
Ø Polyurethane;
Ø Thicker Metallic Zinc with finishing layer;
Ø Polyethylene;
Ø Epoxy;
PACKING of Ductile Cast Iron Pipes
The pipes of DN≤300mm are bound with steel belts, others are in bulk. Special packing can be arranged after mutually agreed.
ACCESSORIES FOR DI PIPES
FITTINGS of Ductile Cast Iron Pipes
Ductile Cast Iron fittings are produced in accordance with the ISO2531, ISO7186, EN545, EN598, BS4772, etc., lined internally with cement as per ISO4179, coated externally with zinc rich followed by bituminous paint. Please consult us if you need special lining or coating, such as FBE or Polyurethane.
All fittings are packed with wooden crate or loose condition on wooden pallet according to their sizes.
Rubber gaskets for pipes are produced in accordance with ISO4633. All gaskets are packed with plastic bags. Gaskets should be stored in closed warehouse to avoid sunlight and high temperatures(prefer below 25 ℃).
POLYETHYLENE SLEEVES
As per customer requirement, polyethylene sleeves of 200-250 microns thickness will be supplied in accordance with ISO8180 in rolls. Sleeves should be stored in warehouse to avoid direct sunlight.
LUBRICATING PASE of Ductile Cast Iron Pipes
Food grade lubricating paste will be used when assembling the joints of pipes. It is water dissolved materials packaged in containers and should be stored in temperature range (-20℃ to +60℃)
The mechanical properties of Pipes shall be as shown in the table:
Type of Cast | Minimum Tensile strength | Minimum Elongation Percent After fracture, A | Hardness Max.(HB) | |
DN80-2600 | DN80-1000 | DN1100-2600 | ||
Pipes centrifugally cast | 420 MPa | 10 % | 7 % | 230 |
Pipes not centrifugally cast, fittings and accessories | 420 MPa | 5 % | 5 % | 250 |
Note: 1. By agreement between manufacturer and purchaser, the 0.2% proof stress may be measured. It shall be not less than 270 MPa when A ≥12% for DN60-1000 or 10% for DN > 1000. 2. For centrifugally cast pipes of DN60 to DN1000, the minimum elongation after fracture shall be 7% for thickness classes greater than K12 | ||||
HYDROSTATIC TEST PRESSURE AT WORKS:
All Pipes and fittings shall be subjected to a works hydrostatic test for a duration of at least 10 seconds at the minimum internal test pressure given in the table.
PIPE DATA:
A). T-type joint pipes:
1) Dimension of Ductile Cast Iron PipesT-type joint pipes:
1) Dimension of Ductile Cast Iron PipesT-type joint pipes:
DN (mm) | Minimum work test pressure (Bar) | ||
Pipes centrifugally cast | Pipes not centrifugally cast and fittings 1) | ||
K<9 | K≥9 | All thickness classes | |
≤ DN300 | 0.5(k+1)2 | 50 | 25 2) |
350—600 | 0.5k2 | 40 | 16 |
700—1000 | 0.5(k-1)2 | 32 | 10 |
1200—2000 | 0.5(k-2)2 | 25 | 10 |
2200—2600 | 0.5(k-3)2 | 18 | 10 |
1).The works hydrostalic test pressure for fittings is less than that for pipes because the shape of fittings makes it difficult to provide sufficient restraint to high pressure during test. 2). 16 bar for pipes and fittings with PN10 flanges. | |||
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