G7 Silicone Glass Laminate Tube
G7 silicone glass laminate tube is a rigid electrical-insulation tube made from glass reinforcement with a silicone-resin binder. It is considered for designs that specify G7-type laminate construction and require insulation performance at elevated operating temperatures. As a direct manufacturer and supplier, we provide G7 Silicone Laminate Tube in made-to-drawing sizes with low minimum order quantities and fast sampling for both prototype and production runs.
Engineering selection
| Selection point | Confirm in the RFQ |
|---|---|
| Material grade | G7 designation, governing standard and required material certificate |
| Dimensions | ID, OD, length, wall thickness, roundness and tolerances |
| Electrical duty | Voltage, dielectric test method, creepage requirements and service environment |
| Thermal duty | Continuous and peak temperature, exposure time and cooling conditions |
| Machining | Cut lengths, holes, slots, tapers and finished-edge requirements |
Typical applications
- High-temperature electrical insulating sleeves
- Fuse, switchgear and transformer components
- Machined insulating parts where a G7 silicone-glass grade is specified
RFQ checklist
Send the drawing or sample, required G7 specification, ID, OD, length, tolerances, machining details, operating voltage, temperature profile, quantity and inspection documents. We will confirm material availability and manufacturability before production.
For different resin systems, compare our G5/G9 glass melamine tube and filament wound tube.
Explore the full insulation range
This construction is part of our electrical insulation tube range. Related constructions: insulating kraft paper sleeves, vulcanized fiber motor shaft bushing, and G5/G9 glass melamine tube. For fuse-body components, see the fuse tubes selection guide.
Frequently asked questions
What makes G7 silicone laminate tube different from standard laminates?
G7 uses a silicone resin with glass cloth, giving higher heat resistance and better retention of electrical properties at elevated temperature than phenolic or melamine laminates.
Where is G7 silicone laminate tube typically specified?
It is used in high-temperature bushings, transformer structures, heating equipment and other parts that must hold insulation performance under heat and humidity.
Silicone resin is the hard part, so we control it in-house
The reason to specify G7 is heat: a silicone binder holds its electrical properties where phenolic and melamine laminates begin to drift. That behaviour depends on resin pick-up, glass-cloth lay-up and cure cycle, all of which vary between suppliers running the same grade label. We laminate G7 tube in our own plant, so the resin system quoted is the one that ends up in the tube.
- Plant-gate pricing on G7 silicone glass laminate tube
- Trial lengths accepted before a production quantity is committed
- Resin content, wall thickness and roundness held to the drawing
- ISO 9001 quality system across lay-up and cure
- SGS material testing available on the G7 laminate
- RoHS and REACH declarations on request
G7 tube: procurement and quality questions
What quantity of G7 silicone laminate tube will you run?
Trial and prototype quantities are accepted, so the resin system and wall can be proven at temperature before production volumes are placed.
What quality evidence supports a G7 tube order?
It is laminated under an ISO 9001 quality system, SGS material testing is available for the G7 build, and RoHS and REACH documents are issued on request.
How soon is a G7 tube enquiry answered?
An engineer reviews the drawing and temperature profile and replies within one working day; the quotation follows once grade, dimensions and quantity are fixed.
Request a quote
Send the drawing with the G7 specification, inside and outside diameter, wall, length and machining details, plus continuous and peak temperature. We confirm resin availability and manufacturability before laminating.