Here are some details on common ASTM standards related to welded outlet:

ASTM A53/A53M

Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless. Covers dimensions and tolerances for welded and seamless carbon steel pipe.

ASTM A106/A106M

Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service. Includes requirements and testing methods for welded and seamless varieties.

ASTM A333/A333M

Standard Specification for Seamless and Welded Steel Pipe for Low-Temperature Service. Provides dimensional data for low-temp carbon and alloy steel pipes with welded or seamless construction.

ASTM A134/A134M

Standard Specification for Pipe, Steel, Electric-Fusion (Arc)-Welded (Sizes NPS 16 and Over). Applies to large-diameter, electric-resistance welded steel pipe.

ASTM A671/A671M

Standard Specification for Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures. Covers electrical resistance and partial-arc welded steel pipe.

ASTM A999/A999M

Standard Specification for General Requirements for Alloy and Stainless Steel Pipe. Includes alloy and stainless pipe in welded and seamless configurations.

Following the guidelines ensures the welded outlets conform to manufacturing, testing and quality control standards for intended applications and pressure service.