CIP-Series Flat-Faced Union Liner

A through-bore stainless steel union liner with a plain tube-weld neck, outer retaining shoulder, and flat sealing face. Offered in SS304 or SS316L across a 1" to 4" nominal size range for pairing with matching union nuts, male ends, and gaskets.

Connection	Butt-weld tube neck with unthreaded union shoulder and flat sealing face
Component Form	Through-bore flat-faced union liner component (nut, male end, and gasket sold separately)
Series Designation	CIP / BSM flat-faced union series
Material Options	SS304, SS316L
Size Range	1" to 4"; embedded BSM figure prints 25.4 to 152.4

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Flat-Faced Liner Profile

This unthreaded union liner features a cylindrical butt-weld neck at the tube end and a radially stepped outer collar with a flat front sealing face. When captured inside a union nut, the rear shoulder transmits axial clamping load while the flat face compresses the union seal against the mating male part.

Wetted Stainless Steel Grades

Because the liner bore forms a direct wetted continuation of the process line, the component is offered in SS304 and SS316L stainless steel. Selecting the matching alloy ensures consistent weld metallurgy and corrosion resistance along the pipeline.

CIP Designation and BSM Drawing Reference

Series specifications classify this part under the CIP series for 1" to 4" nominal sizes, whereas the series schedule Product Name states Hygienic Stainless Steel BSM Liner and embeds a BSM Flat-Faced Liner chart spanning 25.4 to 152.4. The table entry listing Clamp, Weld, Thread is template text; the shown liner welds to tubing.

Selection and Mating Checks

This listing covers the standalone through-bore liner only and is distinct from solid blank liners, threaded male ends, and union nuts. Buyers should confirm the tube outer diameter, wall thickness, collar outer diameter, and axial length before welding into an existing union assembly.

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