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ASTM A106(S/A 106) steel pipes are the standard specification for seamless carbon steel pipe for high-temperature and high-pressures service,such as power generation. ASTM A106 steel pipes contain three grades ASTM A106 Grade A, ASTM A106 Grade B, ASTM A106 Grade C. API 5L is a relatively comprehensive specification,mainly developing line pipes for the oil and gas industry;t he range of astm api 5l 1 12 cheap carbon seamless steel hydraulic pipe

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