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Sunrise petro : What are the grades of API tubing?

2024-01-28 17:40 352 views

The American Petroleum Institute (API) is a leading organization in the oil and gas industry that sets standards and specifications for equipment and materials used in the industry. One of the key areas that API standards cover is tubing grades for oil and gas production. API organizes tubing grades into three groups: Group 1, Group 2, and Group 3. Each group has specific tubing grades that are used for different applications and operating conditions.

Group 1 includes the tubing grades H40, J55, and N80. These grades are used in normal-temperature applications and have relatively low tensile strength requirements. They are suitable for general-purpose oilfield tubing, such as production tubing and drill pipe. Group 1 tubing grades are typically used in shallow wells with low pressure and temperature conditions.

Group 2 includes the restricted-yield tubing grades L80, C90, and T95. These grades have higher tensile strength requirements and are used in applications where there is a need for extra strength and durability. The restricted-yield designation means that the tubing has a yield strength that is lower than the tensile strength, which provides extra safety margin in handling and installation. Group 2 tubing grades are typically used in deeper wells with high pressure and temperature conditions, where extra strength is required.

Group 3 includes the high-strength tubing in seamless grade P110. This grade has the highest tensile strength among all API tubing grades and is used in extreme well conditions, such as high pressure, high temperature, and sour gas environments. The P110 grade is a seamless grade, which means that it is produced without any welds or joints, providing better strength and durability compared to welded tubing. Group 3 tubing grades are typically used in offshore platforms and other critical applications where the highest level of performance is required.

The selection of the appropriate API tubing grade depends on the specific application and operating conditions. It is essential to understand the requirements of each grade, including tensile strength, yield strength, corrosion resistance, and other properties, to ensure that the tubing will perform safely and efficiently under the given conditions.

The American Petroleum Institute (API) continues to update and refine its standards for tubing grades to meet the evolving needs of the oil and gas industry. As technology and production methods advance, there is a growing demand for higher-strength and more corrosion-resistant tubing grades. API’s commitment to developing innovative standards ensures that the industry has access to the most advanced and reliable equipment to meet the challenges of oil and gas production.


Sucker Rod Pump
Sanjack has decades of history in tubing thread processing with advanced production equipment, complete testing methods and high-qualified inspection team. To ensure the quality of tubing products, our company strictly follows the ISO9001 quality system requirements from the production process, process plan, testing methods and management system, and strictly implements Sinopec Q/SHCG 18010-2016 “Casing and Tubing Purchase Technical Specifications”, combine the strict management, advanced manufacturing equipment with scientific inspection methods organically, grasp the quality control of each process, there is a complete quality control system from raw material inspection to the factory Inspection.

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