welded 3PE steel pipe external coating

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Loading Port:: China Main Port

Payment Terms:: TT OR LC

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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 steel pipes compare to other materials in terms of cost?: Steel pipes are generally more cost-effective compared to other materials, as they offer a combination of durability, strength, and affordability. While initial costs may vary depending on the specific type and size of the pipe, steel pipes are often more economical in the long run due to their longevity and low maintenance requirements. Additionally, steel pipes are readily available and widely used in various industries, making them a cost-efficient choice for many applications.

Q: How are steel pipes used in LNG terminals?: Steel pipes are used in LNG terminals for the transportation of liquefied natural gas from storage tanks to various processing units within the terminal. These pipes are designed to withstand the extreme cold temperatures and high pressure of LNG, ensuring safe and efficient transfer of the gas. Additionally, steel pipes are also used for the distribution of LNG to various end-users, such as power plants or industrial facilities, providing a reliable and robust infrastructure for the delivery of this valuable energy source.

Q: What are the common problems or issues faced with steel pipes?: Common problems or issues faced with steel pipes include corrosion, leakage, cracking, and scaling. Corrosion can occur due to exposure to moisture, chemicals, or environmental factors, leading to reduced structural integrity and potential leaks. Leakage can result from faulty welds, damaged seals, or pipe degradation. Cracking can occur due to excessive stress, temperature fluctuations, or manufacturing defects, compromising the pipe's strength. Scaling or buildup of mineral deposits can also restrict flow and affect performance. Regular inspection, maintenance, and proper coating or lining can help mitigate these issues.

Q: Can steel pipes be used for sewage and wastewater systems?: Yes, steel pipes can be used for sewage and wastewater systems. Steel pipes are highly durable, resistant to corrosion, and can withstand high pressure and temperature conditions, making them suitable for transporting sewage and wastewater efficiently and securely. Additionally, steel pipes have a long lifespan and can handle the abrasive nature of sewage and wastewater, making them a reliable choice for such systems.

Q: Seamless steel tube with the tube with what is the difference?: Seamed tube can withstand the maximum pressure is generally less than 20 kg, which is the most secure use. It is generally used in water, gas, compressed air and other low-pressure fluid;

Q: What is the maximum allowable pressure for steel pipes?: Various factors, such as the type of steel used, the pipe's diameter and thickness, and specific industry requirements, determine the maximum pressure allowed for steel pipes. The American Society of Mechanical Engineers (ASME) offers guidelines and standards for pressure vessel and piping design, which include determining the maximum allowable pressure. For power piping and process piping, ASME B31.1 and B31.3 are commonly used codes, respectively. These codes establish design criteria for different materials, including steel, and provide formulas and charts to calculate the maximum allowable pressure for different pipe sizes and wall thicknesses. The maximum allowable pressure is typically determined based on the pipe's ability to withstand internal pressure without experiencing permanent deformation or failure. It is important to consider other factors, such as temperature, corrosion, and the presence of external loads or stresses, as they may also impact the maximum allowable pressure for steel pipes. Therefore, it is essential to refer to the relevant codes, standards, and engineering calculations specific to the application to ensure the safe and reliable operation of steel pipes under the given conditions.

Q: What are the different sizes available for steel pipes?: Steel pipes are available in a wide range of sizes, including standard sizes such as ½ inch, 1 inch, 2 inches, and up to larger sizes like 24 inches and beyond. The specific sizes available depend on the manufacturer and the intended application of the steel pipes.

Q: How does galvanization protect steel pipes from corrosion?: Galvanization protects steel pipes from corrosion by applying a protective zinc coating on the surface of the pipes. This zinc coating acts as a sacrificial anode, meaning it corrodes first before the steel, effectively preventing rust and corrosion from reaching the underlying steel.

Q: What are the factors affecting the lifespan of steel pipes?: There are several factors that can affect the lifespan of steel pipes. 1. Corrosion: Corrosion is one of the primary factors that can significantly reduce the lifespan of steel pipes. Exposure to moisture, chemicals, and other corrosive elements can lead to rusting and degradation of the pipe material over time. 2. Environmental conditions: The environment in which the steel pipes are installed plays a crucial role in their lifespan. Extreme temperatures, humidity, and exposure to various weather conditions can accelerate the corrosion process and weaken the pipe structure. 3. Water quality: The quality of the water flowing through the steel pipes can also impact their lifespan. Water with high acidity or alkalinity levels, excessive chlorine, or other contaminants can cause corrosion and deterioration of the pipe material. 4. Installation quality: The way steel pipes are installed can affect their lifespan. Poor installation practices, such as inadequate support or incorrect alignment, can lead to stress points and structural weaknesses, making the pipes more prone to failure. 5. Maintenance and repair: Regular maintenance and timely repairs are crucial in maximizing the lifespan of steel pipes. Proper cleaning, inspection, and corrosion protection measures can help identify and address potential issues before they progress and cause significant damage. 6. Design and material quality: The design and quality of steel used in pipe manufacturing are important factors in determining their lifespan. High-quality steel with appropriate alloy composition and thickness provides better resistance to corrosion and mechanical stress, ensuring a longer lifespan. 7. Load and pressure: The load and pressure that steel pipes are subjected to can impact their durability. Excessive pressure or frequent variations in pressure can put stress on the pipe walls, leading to fatigue or failure over time. By considering and addressing these factors, it is possible to extend the lifespan of steel pipes and ensure their reliable performance over an extended period.

Q: Do steel pipes expand or contract with temperature changes?: Steel pipes expand when subjected to an increase in temperature and contract when exposed to a decrease in temperature. This phenomenon is a result of the thermal expansion and contraction properties of steel, which is a characteristic of most materials. When steel pipes are heated, the molecules within the metal gain energy and vibrate more vigorously, causing them to move apart and expand in size. Conversely, when the temperature of the steel pipes decreases, the molecules lose energy and move closer together, resulting in a contraction or shrinkage in size. It is important to consider these thermal expansion and contraction properties of steel pipes when designing and installing them, as failure to account for these changes may lead to structural damage, leaks, or other issues.

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