ERW 2PE 3PE steel pipe external coating

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Specifications

water pipeline inner-layer tape
1 Butyl rubber as adhesive
2. SGS test report and DVGW certificate
3. corrosion protection

water pipeline inner-layer tape

State-of-the-Art Pipeline Protection for All Climates & Environments

System description:

WATER PIPELINE Inner -layer tape also be called pipe wrap anti-corrosion tape, polyethylene wrap tape.

water pipeline Inner-layer tapeT100 is engineered to assure a high bond to the primed pipe surface with excellent conformability characteristics, aggressive adhesive for corrosion protection and repair of main line coatings.

Inner-layer tapeT100 series is cold applied tape coating system for corrosion protection of Oil, Gas, Petrochemical, and Waste Waterburied pipeline, pipe can be buried, also can be underground ,overhead ,onshore and offshore .

Structure of water pipeline inner wrap tape
The specification of the tape consists of two layers, adhesive layer and film backing
Adhesive: butyl rubber
Film backing: Special blend of stabilized polyethylene

Features & Benefits

Provides a permanent bond to the primed steel pipes surface and provides protection against chemical electrolytic corrosion for underground pipelines.
long term corrosion protection
Worldwide reference lists. Established in-ground history
High chemical resistance under service temperature.
Outstanding electric property and permanent adhesion.
Cold applied, No release liner. Makes installation fast and easy.
Complies with EN-DIN 30672 and AWWAC-214 international standards and also ASTM standards.
Be used for water pipeline corrosion protection

System Properties

Type	T138	T 150		T165	T180	T 250	T265	T280
Thickness	15mil 0.38mm	20mil 0.508mm		25mil 0.635mm	30mil 0.762mm	20mil 0.508mm	25mil 0.635mm	30mil 0.762mm
Backing	9mil 0.229mm	9mil 0.241mm		10mil 0.25mm	10mil 0.25mm	15mil 0.38mm	20mil 0.508mm	25mil 0635mm
Adhesive	6mil 0.152mm	11mil 0.279mm		15mil 0.381mm	20mil 0.508mm	5mil 0.127mm	5mil 0.127mm	5mil 0.127mm
When used for ductile iron pipes inner layer 980-20 or 980-25 and outer layer 955-20 or 955-25 are recommended.
Elongation	³300%					³400%
Tensile Strength	55 N/cm					70 N/cm
Color	Black					White
Peel Adhesion to Primed Pipe			33 N/cm
Dielectric Strength			30 KV
Dielectric Breakdown			26 KV/mm
Cathodic Disbandment			0.24 in radius 6.4 mm
Water Vapor Transmission Rate			< 0.1%
Volume Resistivity			2.5 x 10¹⁵ ohm.cm
Impact resistance			5.5Nm
Penetration Resistance			<15%
Performance			AWWA C-209,ASTM D 1000,EN 12068

Order information

Length	100ft(30 M),200ft(60 M),400ft(120 M),800ft(240 M)
Width	2’’(50mm),4’’(100mm),6’’(150mm),17’(450mm),32’’(800mm)

Q: How do you inspect steel pipes for defects?: Inspecting steel pipes for defects involves a systematic approach that combines visual inspection, non-destructive testing (NDT) techniques, and specialized equipment. Here are the steps typically followed to inspect steel pipes for defects: 1. Visual Inspection: Start by visually examining the external surface of the pipe, looking for any visible signs of defects such as cracks, dents, or corrosion. Pay close attention to welds, joints, and areas susceptible to stress or damage. 2. Ultrasonic Testing (UT): Ultrasonic testing is commonly used to detect internal defects in steel pipes. It involves using ultrasonic waves that are sent into the pipe and then interpreted based on the echoes received. Any irregularities in the internal structure, like cracks or voids, can be identified and analyzed. 3. Magnetic Particle Inspection (MPI): MPI is a widely used technique to detect surface and near-surface defects such as cracks, seams, or other discontinuities. This method involves applying a magnetic field to the pipe and then applying ferromagnetic particles (usually iron-based) on the surface. These particles will accumulate and form visible indications at the areas of magnetic flux leakage caused by defects. 4. Eddy Current Testing (ECT): Eddy current testing is suitable for detecting surface and near-surface defects in conductive materials like steel. It involves inducing an alternating current into the pipe and monitoring the changes in the electrical currents induced by any defects present. These changes are then analyzed to identify and evaluate the defects. 5. Radiographic Testing (RT): Radiographic testing is performed by exposing the steel pipe to X-rays or gamma rays and capturing the resulting radiographic images. This technique allows for the detection of internal defects such as cracks, porosity, inclusions, or wall thickness variations. The radiographic images are then examined for any indications of defects. 6. Dye Penetrant Inspection (DPI): DPI is a method used to detect surface-breaking defects in steel pipes. It involves applying a liquid dye on the surface, which penetrates into any surface cracks or flaws. After allowing the dye to seep in and adequately react, excess dye is removed, and a developer is applied to draw out the dye from the defects, making them visible. 7. Pressure Testing: Pressure testing involves pressurizing the steel pipe to a predetermined level and monitoring for any pressure drops or leaks. This test ensures that the pipe can withstand the required pressure without any structural defects. It is important to note that the inspection technique used depends on various factors, such as the type of defect being sought, the size and nature of the pipe, and the specific industry standards and regulations. Inspection professionals with expertise in NDT methods and equipment are typically employed to ensure accurate and reliable results.

Q: How are steel pipes used in the construction of dams and water reservoirs?: Steel pipes are commonly used in the construction of dams and water reservoirs due to their durability, strength, and ability to withstand high pressure and heavy loads. These pipes are utilized in various important aspects of dam and reservoir construction. One of the main uses of steel pipes in these structures is for the transportation of water. Steel pipes are used to convey water from the source, such as a river or stream, to the reservoir or dam. These pipes are designed to withstand the high water pressure and ensure that there is a continuous flow of water to the reservoir. The durability of steel pipes allows them to remain intact even in harsh conditions and environments. In addition to transporting water, steel pipes are also used for drainage purposes. They are used to create drainage systems that help regulate the water level in the reservoir or dam. These pipes are strategically placed to control the flow of water and prevent any potential flooding or overflow. Steel pipes are also used in the construction of the spillways and outlets in dams and reservoirs. Spillways are designed to release excess water from the reservoir during heavy rainfall or when the water level is too high. Steel pipes are used in the construction of these spillways to provide a controlled path for the water to flow out of the reservoir, preventing any damage to the dam or surrounding areas. Furthermore, steel pipes are utilized in the construction of penstocks, which are large pipes that transport water from the reservoir to the turbines in a hydropower plant. The pressure generated by the water in these pipes is used to drive the turbines and generate electricity. The strength and durability of steel pipes are crucial for ensuring the smooth and efficient operation of hydropower plants. Overall, steel pipes play a vital role in the construction of dams and water reservoirs. Their durability, strength, and ability to withstand high pressure make them an ideal choice for various aspects of these structures, including water transportation, drainage systems, spillways, and penstocks.

Q: How are steel pipes tested for mechanical strength?: Steel pipes are typically tested for mechanical strength through various destructive and non-destructive testing methods. Destructive tests involve subjecting the pipes to tension, compression, or bending forces until failure occurs, allowing the measurement of their ultimate tensile strength, yield strength, and elongation. Non-destructive tests, such as ultrasonic testing, magnetic particle inspection, or radiographic examination, are also conducted to detect any internal or surface defects that may affect the mechanical strength of the pipes. These tests ensure that steel pipes meet the required standards and specifications in terms of their mechanical strength.

Q: What is the minimum temperature that steel pipes can handle?: The minimum temperature that steel pipes can typically handle is around -45 degrees Celsius (-50 degrees Fahrenheit).

Q: What is the compressive strength of steel pipes?: The compressive strength of steel pipes can vary depending on various factors such as the grade of steel, the manufacturing process, and the dimensions of the pipes. However, on average, steel pipes have a compressive strength ranging from 250 MPa (megapascals) to 650 MPa. The higher the grade of steel used in the pipe, the higher its compressive strength tends to be. Additionally, larger diameter pipes usually have a higher compressive strength compared to smaller diameter pipes. It is important to note that the compressive strength of steel pipes can also be influenced by factors such as temperature, corrosion, and external loads. Therefore, it is crucial to consult the specific standards, specifications, or manufacturer's data for accurate and detailed information on the compressive strength of a particular steel pipe.

Q: How are steel pipes used in the telecommunications sector?: Steel pipes are commonly used in the telecommunications sector for various purposes. Firstly, steel pipes are used as conduit for underground cable installations. These pipes provide protection and support to the fiber optic cables that carry data and voice signals across long distances. The sturdy nature of steel pipes ensures that the cables remain safe from external factors such as moisture, rodents, and accidental damage. Additionally, steel pipes are used in the construction of telecommunication towers and masts. These structures require a strong and durable material to support the weight of antennas, transmitters, and other equipment. Steel pipes, with their high tensile strength and resistance to harsh weather conditions, are ideal for this purpose. Moreover, steel pipes are used for the installation of overhead communication lines. These lines are often suspended between poles or towers, and steel pipes are used as supports or brackets to hold the cables in place. The corrosion-resistant properties of steel make it a reliable choice for outdoor installations that are exposed to the elements. In summary, steel pipes play a crucial role in the telecommunications sector by providing protection, support, and durability to cable installations, tower constructions, and overhead communication lines. Their strength and resistance to environmental factors make them an essential component in building and maintaining reliable telecommunications networks.

Q: What is the load-bearing capacity of steel pipes?: The load-bearing capacity of steel pipes is influenced by a range of factors, including diameter, wall thickness, and steel grade. In general, steel pipes exhibit excellent load-bearing capacity due to their inherent strength and durability. The determination of load-bearing capacity involves utilizing engineering calculations and testing techniques. These calculations take into account factors such as the applied load, pipe dimensions, and material properties of the steel. To accurately ascertain the load-bearing capacity of specific steel pipes for a particular application, it is crucial to refer to engineering standards, guidelines, and consult with a structural engineer.

Q: How are steel pipes used in the construction of solar power plants?: Steel pipes are commonly used in the construction of solar power plants to support the installation of solar panels and to carry the flow of fluids, such as water or steam, within the plant. They provide structural integrity and durability necessary to withstand the environmental conditions and weight of the solar panels. Additionally, steel pipes are used for the installation of underground transmission lines, ensuring efficient and reliable electricity distribution from the solar power plant to the grid.

Q: What are the different types of supports used for steel pipes?: The different types of supports used for steel pipes include pipe hangers, clamps, brackets, and anchors. Pipe hangers are used to suspend the pipe from a structure, while clamps provide support and prevent movement. Brackets are used to secure the pipe to a wall or other surface, and anchors are used to prevent the pipe from shifting or moving. These supports help to ensure the stability and proper installation of steel pipes.

Q: What is the impact resistance of steel pipes?: Steel pipes have high impact resistance, meaning they can withstand significant external forces without fracturing or breaking. This makes them highly durable and suitable for various applications, especially in industries where they are subjected to heavy loads or potential impacts.

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