Extended Butt-Weld Tubular Sight Glass with Perforated Mesh Guard

An inline sanitary tubular sight glass featuring extended butt-weld tangents for orbital/automatic welding, a replaceable tempered glass viewing tube, and a cylindrical perforated stainless steel protective mesh cover. Offered in SS304 and SS316L across 1/2"–4".

Body & Guard Material	SS304 / SS316L (AISI 304 / AISI 316L Sleeve)
End Connection	Extended Butt-Weld Ends (Suitable for Automatic Welding)
Body Construction	Tubular Sight Glass with Perforated Mesh Guard & Stainless Steel Fasteners
Body Shape	Inline Straight-Through Tubular with Extended Spigots
Nominal Size Range	1/2"–4" (1/2", 3/4", 1", 1.5", 2", 2.5", 3", 4")

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Extended Weld Tangents and Perforated Protective Net

This extended welding sight glass features elongated cylindrical butt-weld spigots on both ends, providing sufficient straight tube clearance for automatic orbital welding heads and keeping weld heat farther from the glass seals. Around the replaceable tempered glass tube, a perforated AISI 304/316L stainless steel mesh sleeve guards against external impact and glass fragmentation while allowing clear flow observation through the grid.

Size Range and Process Applications

Source specifications cover nominal sizes 1/2", 3/4", 1", 1.5", 2", 2.5", 3", and 4" for inline visual checks of liquid clarity, turbulence, and cleaning progress across food, dairy, beverage, meat processing, vacuum processing, pharmaceutical, and chemical pipelines.

Material Grades and Gasket Options

Manufactured with CNC-lathed SS304 or SS316L end fittings, full stainless steel tie fasteners, and VMQ (silicone), EPDM, Viton, or PTFE gaskets to suit diverse cleaning agents and process temperatures (with a source-claimed tempered glass rating up to 10 bar).

Pre-Weld Disassembly and Ordering Notes

Disassemble the housing and remove the tempered glass cylinder and elastomer gaskets before performing manual or automatic orbital welding on the extended spigots, then reassemble once the weld zones have cooled completely. Specify the mating tube OD standard and any required heat numbers or MTR material certificates when ordering.