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API 5L is a norme, A106 is a grade of steel

API 5L is a more comprehensive specification mainly developed for line pipes used in oil and gas industry; the range of strength grades is much wider. While the lower strength grades grades A & B are comparable to A106, the other grades have much higher strengths (e.g. X42, X56, X60,...etc). Also, the quality grades are more stringent when PSL2 is applied where as rolled grades are not acceptable and rework is not allowed. Moreover, particular attention is given to toughness and toughness tests for sour services and higher pressure/ temperature classes.

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12y ago
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12y ago

ASTM A106 is a material specification of carbon steel pipes for high temperature service and of seamless manufacture. A106 yield strength is in the range of 25-30 KSI.

On the other hand API 5L defines grades that are comparable to A106 (Gr A & B) while 5L encompasses much more higher strength grades mainly used outside plant piping for transmission pipelines of liquid and gas hydrocarbons.

Moreover, 5L covers methods of manufacture and conditions of delivery in a wider perspective. Rework and toughness are more elaborated on.

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Q: What is the difference between api 5L and a106 piping?
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