Forming Technologies

Cold Pressing

Taking advantage of the characteristics of plastic deformation of metal, the microscopic convex peaks on the surface of the workpiece are flattened by applying pressure, thereby reducing the surface roughness. High pressure is applied in the mold cavity to make a compact molded blank. Including surface rolling, surface extrusion processing, etc. Suitable for polycarbonate, polypropylene and other materials. By cold pressing processing, the tensile strength and elastic modulus of the material can be improved.

Comprehensive Size Ranges

Common specification details for seamless copper core-sized heads DN15 to DN600:

☆Outer diameter dimensions

DN15: The corresponding outer diameter is 22mm or 18mm, of which 22mm is a large outer diameter series and 18mm is a small outer diameter series.
DN20: The outer diameter is 27mm (large outer diameter series) or 25mm (small outer diameter series).
DN25: The large outer diameter series is 34mm, and the small outer diameter series is 32mm.
DN32: The outer diameters are 42mm (large outer diameter series) and 38mm (small outer diameter series) respectively.
DN40: The large outer diameter series is 48mm, and the small outer diameter series is 45mm.
DN50: The corresponding outer diameters are 60mm (large outer diameter series) and 57mm (small outer diameter series).
DN65: There are two types of outer diameters: 76mm (large outer diameter series) and 73mm (small outer diameter series).
DN80: The large outer diameter series is 89mm, and the small outer diameter series is also 89mm.
DN100: The large outer diameter series is 114mm, and the small outer diameter series is 108mm.
DN125: The outer diameters are 140mm (large outer diameter series) and 133mm (small outer diameter series) respectively.
DN150: The large outer diameter series is 168mm, and the small outer diameter series is 159mm.
DN200: The outer diameter is 219mm, and the outer diameter series is the same.
DN250: The large outer diameter series is 273mm, and the small outer diameter series is also 273mm.
DN300: The large outer diameter series is 324mm, and the small outer diameter series is 325mm.
DN350: The outer diameters are 360mm (large outer diameter series) and 377mm (small outer diameter series) respectively.
DN400: The large outer diameter series is 406mm, and the small outer diameter series is 426mm.
DN450: The large outer diameter series is 457mm, and the small outer diameter series is 480mm.
DN500: The outer diameters are 508mm (large outer diameter series) and 530mm (small outer diameter series) respectively.
DN600: The large outer diameter series is 610mm, and the small outer diameter series is 630mm.

☆Wall thickness dimensions

The wall thickness of the seamless copper core head is usually determined based on factors such as use pressure, medium, etc., and generally varies between 1.5mm-20mm. For example, the wall thickness of DN15-DN32 may be between 1.5mm-3mm; the wall thickness of DN40-DN100 is about 2mm-5mm; those above DN100, such as DN150-DN600, may be between 5mm-20mm.

Specifications for welding copper core small heads DN15 to DN1200 (½"-48")

☆Outer diameter dimensions

DN15: The outer diameter is generally 22mm (large outer diameter series) or 18mm (small outer diameter series).
DN20: The outer diameter is 27mm (large outer diameter series) or 25mm (small outer diameter series).
DN25: The large outer diameter series is 34mm, and the small outer diameter series is 32mm.
DN32: The outer diameters are 42mm (large outer diameter series) and 38mm (small outer diameter series) respectively.
DN40: The large outer diameter series is 48mm, and the small outer diameter series is 45mm.
DN50: The corresponding outer diameters are 60mm (large outer diameter series) and 57mm (small outer diameter series).
DN65: There are two types of outer diameters: 76mm (large outer diameter series) and 73mm (small outer diameter series).
DN80: The large outer diameter series is 89mm, and the small outer diameter series is also 89mm.
DN100: The large outer diameter series is 114mm, and the small outer diameter series is 108mm.
DN125: The outer diameters are 140mm (large outer diameter series) and 133mm (small outer diameter series) respectively.
DN150: The large outer diameter series is 168mm, and the small outer diameter series is 159mm.
DN200: The outer diameter is 219mm, and the outer diameter series is the same.
DN250: The large outer diameter series is 273mm, and the small outer diameter series is also 273mm.
DN300: The large outer diameter series is 324mm, and the small outer diameter series is 325mm.
DN350: The outer diameters are 360mm (large outer diameter series) and 377mm (small outer diameter series) respectively.
DN400: The large outer diameter series is 406mm, and the small outer diameter series is 426mm.
DN450: The large outer diameter series is 457mm, and the small outer diameter series is 480mm.
DN500: The outer diameters are 508mm (large outer diameter series) and 530mm (small outer diameter series) respectively.
DN600: The large outer diameter series is 610mm, and the small outer diameter series is 630mm.
DN1200: Usually the outer diameter is 1220mm (Series A).

☆Wall thickness dimensions

For smaller sizes of DN15 - DN100, the wall thickness is usually between 2mm - 5mm.

The specifications of DN100 - DN300 have approximately wall thickness between 5mm and 10mm.

Large specifications above DN300, such as DN350 - DN1200, may have a wall thickness between 8mm and 20mm. However, the specific wall thickness will vary depending on the use pressure, medium and other factors.

Supports SCH5S-XXS pressure ratings, ideal for oil/gas pipelines and cryogenic applications.