The American Petroleum Institute specification API 5L covers seamless and welded steel line pipe. This is steel pipe for pipeline transportation systems in the petroleum and natural gas industries. API 5L is suitable for conveying gas, water, and oil. Size range is limited only by manufacturer’s capabilities.
Specifications for API 5L adhere to the International Organization for Standardization ISO 3183, which standardizes pipeline transportation systems within the materials, equipment and offshore structures for petroleum, petrochemical, and natural gas industries. The technical committee authoring the standards recognized that there are two basic Product Specifications Levels (PSL) of technical requirements and therefore developed PSL 1 and PSL 2. PSL 1 is a standard quality for line pipe where PSL 2 contains additional chemical, mechanical properties, and testing requirements.
Pipe grades, Steel grades and acceptable delivery conditions:
PSL
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Delivery conditions for API 5L X42 PSL1 Seamless Pipe
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Steel grade
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PSL 1
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As rolled, normalizing rolled, thermomechanical rolled / formed, normalizing formed, normalized and tempered; if agreed, quenched and tempered for SMLS pipe only
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B
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As rolled, normalizing rolled, thermomechanical rolled / formed, normalizing formed, normalized and tempered or quenched and tempered
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X42
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X46
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X52
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X56
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X60
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X65
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X70
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PSL 2
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As rolled
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BR
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Normalizing rolled / formed, normalized, normalized and tempered
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BN
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Quenched and tempered
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BQ
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Material Grades
High Temperature Seamless Pipe
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ASTM A106 Gr. B/C, API 5L Gr. B, ASTM A53 Gr. B
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Heat Exchanger Seamless Tube
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ASTM A179
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Low Temperature Seamless Pipe
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ASTM A333 Gr. 3/6
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Low Temperature Seamless Tube
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ASTM A334 Gr. 6
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High Yield Seamless Pipe
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API 5L Gr. X42/X46/X52/X56/X60/X65/X70/X80 PSL-1/PSL-2
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High Yield Seamless Pipe
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ISO 3183 Gr.L245, L290, L320, L360, L390, L415, L450, L485
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Atmospheric & Low Temp EFW Pipes
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ASTM A671 Gr. CC60/CC65/CC70
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High Pressure & Moderate Temp EFW Pipes
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ASTM A672 Gr. B60/B65/B70/C55/C60/C65/C70
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High Yield ERW/SAW Pipe
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API 5L Gr. X42/X46/X52/X56/X60/X65/X70/X80 PSL-1/PSL-2
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High Yield ERW/SAW Pipe
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ISO 3183 Gr.L245, L290, L320, L360, L390, L415, L450, L485
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