Choosing between the XHJ-270 vs XHJ-350 steel bar truss welding line is a practical production decision for precast concrete plants, floor deck manufacturers, and reinforcing truss suppliers. Both machines are designed for automated steel bar truss production, but buyers still need to compare truss height range, output expectations, wire diameter, factory layout, utilities, and the final configuration included in the quotation.
This guide uses YZ Welding’s published product information as the baseline. The public specifications show many shared core parameters, so the safest way to compare the XHJ-270 and XHJ-350 is not to invent a gap that may depend on options. Instead, buyers should use the shared technical range as a starting point and then confirm the project-specific differences with the supplier.
Short Answer: How to Compare XHJ-270 and XHJ-350
If your factory needs a high-speed automatic truss welding line for common reinforced truss sizes, start by checking the XHJ-270 product page. If your project requires the XHJ-350 model name, a broader quotation package, or a configuration aligned with 70-350 mm straight truss height, review the XHJ-350 product page and confirm the exact option list. For both models, the final buying decision should be based on truss specification, output target, plant layout, power, compressed air, cooling water, operator workflow, and after-sales support.
Published Core Specifications
The two product pages share a similar technical foundation. That is useful for buyers because it creates a clear checklist for factory planning before a formal quotation. Always confirm the current configuration with YZ Welding before ordering, especially if the line will be customized.
| Item | Published Specification to Confirm |
|---|---|
| Rated power | 3 x 250 kVA |
| Power supply | 380V, 50Hz |
| Phase | Three phase-four wire |
| Load duration rate | 20% |
| Air source pressure | 0.6-0.8 MPa |
| Cooling liquid flow | More than 150 L/min |
| Cooling liquid temperature | 30 C or lower |
| Device dimension | 39.4 m x 4.4 m x 3.3 m |
| Oil pressure | 7-11 MPa |
| Truss height | Straight truss 70-350 mm; bending-foot truss 70-300 mm |
| Wave crest spacing | 190-210 mm adjustable |
| Wave wire diameter | Diameter 4-8 mm plain bar |
| Upper chord wire diameter | Diameter 6-14 mm |
| Lower chord wire diameter | Diameter 6-14 mm |
| Rated speed reference | 12 m/min, changing with truss height |
XHJ-270: When It Fits
The XHJ-270 is positioned as a full-automatic high-speed steel bar truss welding production line. It is a good starting point for buyers who want automated truss production with stable welding, adjustable wave crest spacing, PLC control, and a hydraulic-powered feeding and clamping system. For many factories, the key reason to consider this model is a balance between automation, repeatable truss quality, and manageable operation.
Buyers should prepare the expected truss height, foot type, chord bar diameter, diagonal wire diameter, truss length, and daily output. Those details determine whether the standard configuration is enough or whether the line needs customized feeding, discharge, stacking, or factory-layout planning.
XHJ-350: When It Fits
The XHJ-350 is suitable for buyers who are specifically planning around a truss height range up to 350 mm for straight truss products and want a complete automatic line package. Because the published product data overlaps with the XHJ-270 in several areas, the most important step is to ask what is included in the XHJ-350 quotation: feeding racks, straightening system, main welding unit, discharge rack, hydraulic station, cooling system, control cabinet, and installation support.
If your factory produces floor deck trusses, precast component reinforcement, or project-based truss sizes that change often, the XHJ-350 conversation should focus on changeover time, recipe control, straightness control, and whether the discharge and handling system can keep up with the planned output.
Side-by-Side Buyer Comparison
| Decision Point | XHJ-270 | XHJ-350 |
|---|---|---|
| Main buyer question | Do I need a full-automatic high-speed truss line for common production demand? | Do I need a line planned around the XHJ-350 model and 350 mm straight truss range? |
| Truss height planning | Confirm project height range, especially bending-foot truss requirements | Confirm straight truss up to 350 mm and bending-foot height requirements |
| Output planning | Use 12 m/min as a reference and adjust for height, wire size, and cutting length | Use 12 m/min as a reference and confirm real output by product specification |
| Factory layout | Plan around line length, coil area, hydraulic station, cooling, and discharge | Same layout review, with extra attention to output handling and truss length |
| Quotation focus | Standard equipment package, automation level, and optional handling units | Complete module list, changeover support, and project-specific configuration |
| Best fit | Factories prioritizing automatic production and balanced investment | Factories requiring XHJ-350 project fit and detailed configuration confirmation |
Output Is Not Only Line Speed
The published speed reference is 12 m/min, but real output changes with truss height, wire diameter, wave spacing, cutting length, foot type, and discharge handling. A factory producing shorter trusses may spend more time on cutting and handling. A factory producing taller or heavier trusses may need more attention to straightness, feeding stability, welding heat, and cooling.
Before choosing between XHJ-270 and XHJ-350, calculate output using your actual product list. Include shift hours, changeover time, operator breaks, inspection, coil replacement, and maintenance. This gives a more realistic capacity estimate than using rated line speed alone.
Quality Factors Buyers Should Check
- Welding stability: electrode life, welding head design, transformer capacity, and cooling flow affect weld quality.
- Truss straightness: feeding, clamping, straightening wheels, and tension control determine whether the finished truss stays aligned.
- Wave spacing accuracy: the 190-210 mm adjustable wave crest interval must match the structural design requirement.
- Wire diameter range: check upper chord, lower chord, and wave wire diameters against your real rebar inventory.
- Hydraulic system: stable oil pressure supports feeding, clamping, and welding quality.
- Control system: PLC and HMI settings should make length, height, and production recipe adjustments repeatable.
For deeper operating guidance, read our articles on how to control straightness in steel bar truss welding and common defects in steel bar truss welding. If you are planning a new plant layout, the floor deck truss production line layout guide is also useful.
Factory Layout and Utility Checklist
Both models require proper utility planning. The published equipment dimension is 39.4 m x 4.4 m x 3.3 m, but the actual factory layout should also include coil storage, loading clearance, operator access, finished truss discharge, forklift movement, electrical cabinet space, hydraulic station space, cooling water circulation, and maintenance aisles.
- Confirm 380V 50Hz power availability and transformer capacity.
- Prepare stable compressed air at 0.6-0.8 MPa.
- Plan cooling liquid flow above 150 L/min and temperature control at or below 30 C.
- Reserve enough space for coil feeding and finished truss handling.
- Check whether the discharge rack length matches your truss length range.
- Confirm operator training, spare parts, installation, and commissioning support.
How to Request a Useful Quotation
When contacting YZ Welding, do not ask only for the machine price. Send your truss drawings, required truss height, straight or bending-foot type, upper and lower chord diameters, wave wire diameter, wave spacing, truss length, daily output target, factory voltage, available floor space, and preferred automation level. This allows the supplier to recommend whether XHJ-270, XHJ-350, or another truss welding line is the better fit.
You can also review the Girder Truss Welding Lines category and the guide on how to choose a steel bar truss welding line by height, pitch, and output before finalizing your comparison.
FAQ
What is the main difference between XHJ-270 and XHJ-350?
The public product data shows many shared core specifications, so the practical difference should be confirmed by quotation configuration, truss drawing, output target, and included modules. Buyers should ask YZ Welding to confirm the exact package for their project.
What truss height can these lines produce?
The published specification lists straight truss height from 70-350 mm and bending-foot truss height from 70-300 mm. The final range should be confirmed against your truss type and tooling requirements.
Is 12 m/min the guaranteed output?
No. It is a useful reference speed, but actual output changes with truss height, wire diameter, cutting length, wave spacing, changeover time, and handling efficiency.
What information should I prepare before choosing a model?
Prepare truss drawings, height, length, chord bar diameter, wave wire diameter, wave spacing, straight or bending-foot design, daily output target, factory layout, voltage, compressed air, and cooling water conditions.
Can the line be customized?
Configuration can often be adjusted according to product range, layout, automation level, and handling requirements. Confirm customization details with YZ Welding before finalizing the order.
Need help matching XHJ-270 or XHJ-350 to your production plan? Contact YZ Welding with your truss drawings and output target.
