Specifications

Gas Inlet Tube · Specifications

Standard sizes are listed below. All products comply with GB/T, ASTM, and ISO standard taper systems. Full range 10/19 ~ 60/45 available. Custom configurations and lengths are available.

Request custom specs

1. Straight Gas Inlet Tube

GB/T	ASTM	ISO	Standard Length (mm)	Hose O.D. (mm)	Material
Please contact us to confirm the available specifications.

2. Bent Gas Inlet Tube (90°)

GB/T	ASTM	ISO	Standard Length (mm)	Hose O.D. (mm)	Material
Please contact us to confirm the available specifications.

3. Fritted Gas Inlet Tube

GB/T	ASTM	ISO	Frit Grade	Standard Length (mm)	Material
Please contact us to confirm the available specifications.

4. Gas Inlet Tube with Stopcock

GB/T	ASTM	ISO	Stopcock Type	Bore (mm)	Material
Please contact us to confirm the available specifications.

* Joint numbers (10#, 14#) indicate the largest diameter (mm) of the taper. All are 1:10 taper.
* GB/ASTM/ISO designations are different standard identifiers — physical dimensions are identical and fully interchangeable.
* Full range 10/19 ~ 60/45 available upon request.
* Standard length 300mm (straight) / 150mm (bent/fritted). Custom lengths 70mm ~ 500mm available.
* Standard hose O.D. is 8mm; 6mm / 10mm available upon request.
* Contact our sales team for MOQ and lead time on custom orders.

✦ Customization Services — We offer custom joint sizes, configurations, lengths, and hose diameters. Share your specific requirements and our technical team will provide a tailored solution.

Product Description

The gas inlet tube is a fundamental accessory for connecting apparatus and transferring gases in standard taper glassware systems. One end features a precision-ground standard taper joint for secure connection to standard joint glassware, while the other end features a serrated hose connection for attaching rubber or plastic tubing.

Manufactured from high-borosilicate glass 3.3 with excellent chemical purity and resistance, the gas inlet tube resists reactions with experimental chemicals. The standard taper design ensures interchangeability with all standard joint glassware from different manufacturers. The tube withstands temperature changes and chemical exposure, making it suitable for a wide range of chemical environments.

Key Features

Borosilicate Glass 3.3: Meets ISO 3585, low thermal expansion, thermal shock resistance up to 280°C, excellent chemical durability
Multi‑Standard Compliance: Precision‑ground 1:10 taper meets GB/T, ASTM E, and ISO 3585 standard taper specifications for full interchangeability
Versatile: Compatible with all standard taper glassware for easy apparatus assembly
High Clarity: Visual observation of gas flow and condensation
Smooth Surface: Easy to clean, resists chemical adhesion
Multiple Configurations: Straight, bent (90°/105°), fritted, and with stopcock options

Quality Assurance

Each gas inlet tube is inspected for taper accuracy and surface finish to ensure reliable sealing with all standard joint components. Custom bulk orders are welcome.

Tip: Ensure joints are clean and dry before use. Use hose clamps to secure tubing connections. Custom lengths are available based on your apparatus setup.

Applications

Typical Uses

Gas Preparation & Collection

Connect gas generation and collection apparatus

Gas Property Experiments

Connect apparatus for gas oxidation, reduction, and acidity tests

Exhaust Gas Absorption

Connect to absorption apparatus for hazardous gas treatment

Distillation & Reflux

Gas line connections in distillation setups

Schlenk Line Operations

Gas introduction/evacuation in inert atmosphere work

Compatible Equipment

Standard joint flasks, reaction tubes, three-neck flasks

Gas generators, collection apparatus

Gas scrubbers, washing bottles

Distillation heads, fractionating heads, condensers

Schlenk lines, vacuum manifolds

Tip: Always use matching standard joint sizes for optimal sealing. Use hose clamps to secure tubing connections at the hose barb.

Operation & Maintenance

User Guide

Before Use

Inspect for cracks, chips, or scratches on any joint
Clean the joint surface with a soft cloth to remove particulates
Confirm that the joint size matches your apparatus
Prepare appropriate tubing for the hose connection

Installation

Align the joint with the receiving port and gently twist to seat
Attach tubing to the hose barb and secure with a hose clamp
Use a clamp on the tube body for support if needed
Check all connections for seal integrity before gas flow

Stopcock Operation (if equipped)

For glass stopcocks, apply a thin layer of vacuum grease if needed
PTFE stopcocks require no lubrication
Rotate the stopcock gently; avoid excessive force

Cleaning & Storage

Clean immediately after use to prevent blockage
Use soft brushes and appropriate detergents for the tube interior and joint
For fritted versions, clean the frit area carefully
Air dry and store with protective paper between ground joints
Protect joints from impacts

Gas Inlet Tube · Selection Guide

Four key dimensions determine the right gas inlet tube for your system: configuration, joint size, length, and additional features.

1. By Configuration

Configuration	Features	Typical Use
Please contact us to confirm the available specifications.

2. By Joint Size

Scale	GB/T	Typical Volume	Matching Apparatus
Please contact us to confirm the available specifications.

3. By Length

Length Range	Typical Application
Please contact us to confirm the available specifications.

4. Quick Selection Checklist

Follow this decision flow to quickly identify the right configuration:

① Need to change gas direction? No → Straight | Yes → Bent
② Need gas dispersion? No → Standard | Yes → Fritted
③ Need flow control? No → Without stopcock | Yes → With stopcock
④ Scale? Micro → 10#/14# | Standard → 19#/24# | Large → 29#+
⑤ Apparatus distance? Short → 70~150mm | Standard → 150~300mm | Long → 300~500mm

✦ Need help selecting? Contact our technical support team with your apparatus requirements — we'll recommend the optimal configuration.

Care & Notes

Show care & notes

Safety Precautions

Always operate in a fume hood when handling toxic or flammable gases
Verify seal integrity before starting gas flow
Wear protective gloves and safety goggles

Do not

Never use cracked or damaged tubes in gas lines