Ordering custom quartz glass tubes requires providing precise specifications. The manufacturer needs detailed information to produce a tube that meets your exact requirements. Here is a comprehensive guide to the parameters you need to supply.

Key Dimensional Parameters

The most critical measurements include the outer diameter (OD) and inner diameter (ID) of the tube, typically expressed in millimeters. The ID is essential as it determines the flow capacity or clearance for the tube's contents. Wall thickness is also important, as it affects strength, weight, and thermal performance. The length of the tube is required for cutting to size.

Dimensional Tolerances

Specifying the acceptable tolerance ranges for OD, ID, and wall thickness is critical. Standard tolerances are typically ±0.1mm for OD and ±0.05mm for ID, but these can be tightened for precision applications.

Material Grade and Purity

Quartz glass is available in various grades, each suited to different applications. Synthetic fused silica is the highest purity grade, with metal impurities below 1 ppm, and is used for optics and semiconductor applications. Natural quartz has slightly higher impurity levels but is more affordable. Specify the required purity level, which can be 99.99% or higher for demanding applications.

Optical Properties

If the tube will be used in optical applications, you must specify the transmission spectrum, indicating the required transmittance at specific wavelengths. The OH content is also important; low-OH quartz is used for deep UV, while high-OH quartz may be better for infrared applications.

Additional Design Features

Provide details of any special features such as end configurations (flat, rounded, or custom), surface finish (polished or ground), and markings (such as identification numbers or orientation marks).

The Bottom Line

Providing complete and accurate specifications is the foundation for producing high-quality custom quartz glass tubes. Be as precise as possible, and always consult with the manufacturer to ensure all parameters are correctly interpreted and that the final product meets your expectations. A comprehensive set of drawings and specifications ensures that the manufacturer can produce the component you need, exactly as you need it.