1. Clamping Segments ($\mathbf{Clamping}\mathbf{Segments}$) $\mathbf{TX}38P$

Description

• Designed for use with the Type B arbor ($\mathbf{mounting}\mathbf{mandrel}$).

• One "pair" of segments (i.e., $2$ segments) constitutes one set for a specific pipe Inner Diameter ($\mathbf{ID}$) range.

• Several types/sizes of segments are available depending on the pipe diameter, for example: Type B1 ($13.8-16.8\text{ mm}$), B2 ($16.6-19.6\text{ mm}$), B3 ($19.4-22.4\text{ mm}$), B4 ($22.2-25.2\text{ mm}$), B5 ($25-28\text{ mm}$), etc.

Purpose

• Fixation and centering of the pipe in the $\mathbf{TX}38P$ head before welding—ensuring mechanical stability, which is critical for high-quality joints.

• Modularity: Segments of different sizes allow the head to be adapted to various pipe diameters without changing the entire mandrel.

2. Mounting Mandrel ($\mathbf{Mounting}Mandrel/Arbor$)

Description

• The mounting mandrel ($arbor/mandrel$) is the base element onto which the clamping segments and spring sleeves are installed.

• It performs the function of centering the entire welding assembly relative to the axis of the tube-to-tubesheet joint.

• It features an insulation sleeve and a clamping cone—for safe and reliable contact.

Purpose

• Ensures correct and stable positioning of all fixation elements (segments, sleeves) during welding.

• Flexible Solution: Allows one arbor to be used with different sets of segments that fit various pipe diameters.

3. Spring Sleeves ($\mathbf{Spring}\mathbf{Sleeves}$) $\mathbf{TX}38P$

Description

• Sleeves are manufactured for the $\mathbf{TX}38P$ and fit Type A arbors.

• Several standard sizes of sleeves exist, corresponding to different pipe Inner Diameters ($\mathbf{ID}$):

  • Type A1: $10.0-11.3\text{ mm}$

  • Type A2: $11.0-12.7\text{ mm}$

  • Type A3: $12.5-14.0\text{ mm}$

• Code and weight example: Sleeve A1 — Code $830020022$, weight approximately $0.030\text{ kg}$.

Purpose

• Sleeves serve for precision centering of the arbor inside the pipe: the spring mechanism compensates for small deviations.

• Provide rigid yet elastic fixation, which is important for forming a stable joint without excessive mechanical stress.

4. Electrode Support ($\mathbf{Tungsten}Support/Electrode\mathbf{Support}$) $\mathbf{TX}38P$

Description

• This is a special holder for the tungsten electrode, compatible with the $\mathbf{TX}38P$ head.

• Version: full kit, for a $2.4\text{ mm}$ electrode.

• Part number: $830013010$ for the $2.4\text{ mm}$ holder.

Purpose

• Ensures a stable mechanical position of the electrode during welding.

• Prevents uneven wear or slippage of the electrode, which could impair the quality of the arc and the weld seam.

• Essential for accurate setup, especially when working with thin-walled pipes where electrode positioning is critical.

Recommendations for Selection and Use

• Always select segments that exactly match the inner diameter of the pipes you will be working with—this guarantees correct centering and fixation.

• Spring sleeves must also be matched to the pipe diameter: an ill-fitting size can lead to play or excessive compression.

• Select the electrode holder according to the diameter of the tungsten electrode—this is most often $2.4\text{ mm}$ for the $\mathbf{TX}38P$, but check the specification.

• For series production or frequent pipe changes: secure a stock of segments and sleeves for different sizes to quickly reconfigure the head.

• After replacing segments or sleeves, it is recommended to verify the centering before starting welding to avoid weld defects.