The feed water lining malleable cast iron pipe is made of hot dip galvanized marsteel pipe as the matrix, and the internal plastic is molded by injection molding PP-R. It is used with steel-plastic composite pipe, which has the same corrosion resistance as pipe, and is interchangeable and universal. It is mainly used in the field of drinking water supply. The plastic malleable cast iron pipe has an interface core and a rubber washer interface. The biggest advantage of the connected pipeline system is that the conveying medium does not contact with the steel.
Technical parameters
- Specification:
- DN15-DN100
- Product Type:
- 45°, 90° elbow, reducer three way, four way, external connection, internal connection, pipe cap, bushing, plugging, etc
- Criteria:
- GB/T 28897 "Steel plastic composite pipe and pipe fittings for fluid transportation"
- Material:
- Malleable cast iron, PP-R.
Product Performance
Main physical and chemical properties
| Serial number | Project | Technical parameters |
| 1 | Appearance | The surface of the lining layer should be smooth and smooth, without obvious marks, depressions, iron exposure and uneven color |
| 2 | Strength of compression | The compressive strength test of the sample composed of the liner plastic pipe and the liner plastic composite steel pipe was carried out under the condition of room temperature, the test pressure was 2.5MPa, and the pressure stabilization time was 1 min. After the test, the sample should not appear crack and leakage phenomenon |
| 3 | Corrosion resistance | Using the method of NaCl solution accelerating corrosion of the interface of the pipe system composed of the lining plastic pipe parts, the ability index of the plastic layer of the lining plastic pipe parts to prevent the conveying medium from contacting iron was judged. Its iron precipitation should not exceed 0.3 mg/L |
| 4 | Performance of engagement | After the plastic lining pipe parts are connected with the plastic lining composite steel pipe, the interface core should not have cracks, deformation and other abnormal phenomena. The steel plastic pipe base pipe and pipe fitting matrix should not contact with water, and the sealing material should not affect the pipeline water flow channel after extrusion |
| 5 | Strength of bond | The lining layer and the matrix of the pipe fittings should be firmly combined, and there is no loosening phenomenon when prying |
| 6 | Performance of hygiene | The health index of the lining layer should meet the requirements stipulated in the "Standard for Health and Safety Evaluation of Drinking Water Transmission and Distribution Equipment and Protective Materials" |
