Marine Seamless Steel Pipe
Marine steel pipes and tubes are a sort of specialized steel pipes for marine purposes. Hi-Sea Marine as a professional supplier of marine steel, we can provide you a broad product range and a full line of specification. With regard to marine steel pipes and tubes, we are available to supply pipes made of various kinds of materials, such as stainless steel, carbon steel, alloy... The pipes conform to requirements of ASTM, ASME, SPI, EN, JIS, DIN, GB, RS, ABS, BV, CCS, RINA... We can customize pipes in accordance with your requirements, available for large diameter, small diameter, heavy wall, thin wall... Please contact us for more information!
Specifications of Marine Seamless Steel Pipe Table 1 Grade of Seamless Steel Pipe (Pressure Tubing)
| Pipe Range | I | Ⅱ | Ⅲ | |||
| Designed Pressure(Mpa) | Designed Temperature (℃) | Designed Pressure (Mpa) | Designed Temperature (℃) | Designed Pressure (Mpa) | Designed Temperature (℃) | |
| > | ≤ | |||||
| Steam and Hot Oil | 1.6 | 300 | 0.7-1.6 | 170-300 | 0.7 | 170 |
| Fuel Oil | 1.6 | 150 | 0.7-1.6 | 60-150 | 0.7 | 60 |
| Other Media | 4.0 | 300 | 1.6-7.0 | 200-300 | 1.6 | 200 |
Note:
When the designed pressure and temperature reach the ones in the above Class I, this steel pipe belongs to Class I pipe. If it meets the pressure and temperature of Class II, it is defined to be the Class II pipe.
Other media refer to air, water, lubricating oil and hydraulic oil.
Class III seamless steel tubes can be manufactured in accordance with the national standards approved by the ship inspection department.
1) As for the seamless steel pipe for boiler and super heater purpose, the working temperature of wall thickness does not exceed 450℃.
2) The dimension of marine seamless steel pipe should firstly select the general steel pipe size in the first group of GB/T7395-1998 table one. The outside diameter of steel tube should choose the standard outside diameter size in the first series of GB/T7395-1998. We can also produce pipes with other specifications not appear in the GB/T7395-1998 table one.
Black paint, Varnished,PE coated,Galvanized,hdpe,Customed
Before Painting
Preparation of painting specification involves understanding environmental factors, location of piping (indoor or outdoor), insulation requirements, operating and design temperatures. It may also involve local rules and regulations as well as availability of materials.
Painting Workflow
- Ensure all tests are performed on piping system before starting painting work.
- Clean painting surface to remove oils, grease, dirt.
- Ensure proper room temperature and humidity levels.
- Use hand tools, machine tools, shot blasters etc to clean surface as per relevant standards and project requirements.
- Apply primer within 4 hours of surface preparation.
- Apply paint coats after previous coats have dried up, as per instructions of paint manufacturer.
Components Requiring Painting
• Carbon steel ducts, furnaces and stacks require painting.
• All un-insulated equipments like columns, vessels, drums, heat exchangers, pumps, compressors, electrical panels, motors etc. require painting.
• All structural componets like steel members, platforms, ladders,handrails etc. required painting.
Types of Painting Methods
• Painting by Brush
• Painting by Air Spray Painting Machine
• Painting by Airless Spray Painting Machine
Surfaces that should not be painted.
Non-ferrous materials like Aluminium are not required to be painted. Also other surfaces like Valve Stems etc. Checkout this complete list of surfaces that should not be painted.
Characteristics of Piping Paint Material
Paint material used for painting pipes and equipments must adhere to certain requirements as per project specification .Check out these typical requirements for various types of primers and paints.
Typical Piping Painting Systems
Check out these combinations of typical piping painting systems which comprise of surface preparation, primer coats and top coats.
Humidity Requirements During Painting
Proper weather conditions surrounding the place of painting work is essential w.r.t. humidity levels and room temperature. Check out these humidity and temperature requirements.
Qualification Criteria for Painting Contractor
Painting contractor needs to posses these qualifications for good quality of painting work in time.
Inspection and Testing Procedure
Sound inspection and testing procedure must be in place to ensure good quality of painting work. Check out this article for complete information on inspection and testing procedure.
