ERW Pipe made to American Petroleum Institute requirements is known as API 5L ERW. Petroleum products and other goods are transported via a network of pipes. Because of this, the lines must be resistant to corrosion and wear. The material's resistance to abrasion and degradation is excellent. High-strength carbon steel, it is incredibly durable and resistant to stress. The API 5L Welded Pipe is made from a carbon steel strip or piece of sheet or plate.

Welding can be done in either a spiral or longitudinal direction. The diameters and lengths of the pipes vary as well. Single random, double random, or custom cut lengths are all options for the API 5L x65 pipe. The schedules dictate how thick the pipes should be. From 5 to 160 and XXS, there are a variety of programs. The API 5L X42 pipeis used in high-stress areas. The material has a tensile strength of 490MPa and yield strength of 240MPa. Electric resistance welding creates the sturdy CS API 5L X52 pipe.

A decision of the P-grades

The chrome-moly pipe is available in various "P Grade" materials, including P5, P9, P11, P22, and P91.

Refineries, power plants, petrochemical plants, hydrocrackers, cokers, high- and super-high-temperature pipelines, reheat pipelines, and distillation is just a few of the facilities and operations where SA335/A335 steel is widely utilized worldwide. P5 and P9 are the two most prevalent P grades used in refineries. Petrochemical and power generation facilities most typically use P11, P22, and P91 as P grades. Although they appear to be of the same design, it is possible to figure out that they are not using the same piping standards after a cursory examination. For example, a "natural gas processing facility" might take many various forms, each with its own set of design and pipeline choices.

The following are some of the essential considerations that design engineers should address when deciding on a P grade:

• Strength's physical attributes
• Limits of the maximum temperature
• The maximum amount of stress that can be tolerated
• Thermal exhaustion and the number of operations
• Number of loops and bends, as well as their arrangement,
• The ability to resist creep.
• Resistance to creep incompatibility
• Measurements of hardness
• Temperatures for preheating and post-weld heat treatment
• Temperature, pH, oxygen concentration, quality, flow velocity, quality of oxide layer, and chemical composition are all critical variables in the process.
• Costs and time spent on fabrication
• Incorporating pipe supports into the equation of weight
• Variation in the material list due to changes in temperature and pressure as steam travels through turbine and pipe systems. As a result, the designer can use pipes with thinner walls or lower grades in various parts of the plant.
• Material availability and cost differences between different grades; when the upper limits of a range come into play, and upgraded material is often preferred.

P-grade selection is a time-consuming and challenging decision that must be made by the design engineers alone.If you need p grade selection you can contact with P11 pipe suppliers and P22 pipe suppliers.