Adopt high-quality carbon steel, stainless steel and alloy steel bars that meet ASTM A182 standard. Strictly inspect chemical composition, mechanical properties and surface condition to exclude cracks and impurities. Qualified raw materials are precisely cut into fixed-size blanks for forging processing.
2.Heating & Closed Die Forging:
The blanks are heated to the standard forging temperature with stable heating parameters.Integral closed-die forging is applied to form the saddle fitting surface, reinforced body and straight butt-weld branch structure. The finished forging features dense internal grain, uniform wall thickness and complete reinforcement performance suitable for high-pressure welding.
3.Trimming, Straightening & Heat Treatment:
Remove forging flashes and redundant materials, and straighten workpieces to eliminate forming deformation. Implement professional heat treatment including stress relief for carbon steel and solution treatment for stainless steel, which effectively removes forging residual stress and improves overall mechanical strength and corrosion resistance.
4.Precision Welding End Machining:
Precisely machine the saddle surface to perfectly match the outer circle of the main pipe.Turn and chamfer the branch butt-weld end to form standard welding bevel and qualified dimensional tolerance, complying with industrial butt welding installation standards.
5.Surface Finishing & NDT Inspection:
Clean internal and external burrs, oxide scales and dirt. Conduct full dimensional inspection, visual inspection and nondestructive testing to ensure zero defects in structure and size, meeting high-pressure piping engineering requirements.
6.Marking, Anti-rust Treatment & Warehousing:
Mark qualified products with material grade, specifications, execution standard and heat number. Complete anti-rust protection and standardized packaging before warehousing and delivery.