ASTM A106 Grade B steel pipe is primarily used for high-temperature service in pipelines and refineries. Its equivalent specifications include:

API 5L Grade B: This specification covers seamless and welded steel line pipe. API 5L Grade B is commonly used in pipeline transportation systems in the petroleum and natural gas industries.

DIN 17175 St45.8: This is a seamless carbon steel boiler tube used in elevated temperature service, similar to ASTM A106 Grade B.

EN 10216-2 P265GH: This European standard specifies seamless steel tubes for pressure purposes. P265GH is a non-alloy steel with high temperature properties, suitable for applications similar to ASTM A106 Grade B.

JIS G3456 STPT410: This Japanese standard specifies carbon steel pipes for high-temperature service. STPT410 is comparable to ASTM A106 Grade B in terms of its use in high-temperature applications.

These equivalents provide options for users depending on regional or project-specific requirements, ensuring compatibility with standards and specifications for seamless carbon steel pipes used in high-temperature service.