Specification of butt-weld fittings:

General Specifications:

1. Manufacturing Process: Butt-weld fittings are manufactured using various processes, including forging, extrusion, and welding.
2. Material Grades: Fittings are available in various material grades, including carbon steel, stainless steel, alloy steel, low-temperature steel, high-yield steel, duplex and super duplex steel, nickel alloys, and titanium.
3. Sizes: Fittings are available in sizes ranging from 1/2″ to 48″ (DN 15 to DN 1200).
4. Thickness: Fittings are available in various thicknesses, including Schedule 10, Schedule 40, Schedule 80, and Schedule 160.

Dimensions:

1. ASME B16.9 ( Butt-Welding Fittings)
2. ASME B16.25 (Butt-Welding Ends)
3. MSS SP-43 (Wrought Stainless Steel Butt-Welding Fittings)
4. MSS SP-75 (Specification for High-Test Wrought Butt-Welding Fittings)

Tolerances:

1. ASME B16.9 (Table 1 – Permissible Variations for Butt-Welding Fittings)

Testing and Inspection:

1. Hydrostatic Testing
2. Radiographic Examination (RT)
3. Ultrasonic Examination (UT)
4. Magnetic Particle Examination (MT)
5. Liquid Penetrant Examination (PT)

Marking and Packaging:

1. Marking: Fittings are marked with the manufacturer’s name, material grade, size, thickness, and heat number.
2. Packaging: Fittings are packaged in wooden crates, pallets, or bags to prevent damage during transportation.

Certifications:

1. ASME B16.9
2. ASME B31.1 (Power Piping)
3. ASME B31.3 (Process Piping)
4. ASME B31.8 (Gas Transmission and Distribution Piping Systems)
5. PED (Pressure Equipment Directive)
6. ISO 9001 (Quality Management System)

Note: The specific specification requirements may vary depending on the industry, application, and region. It’s essential to consult the relevant standards and specifications for your specific project.