أنابيب مستطيلة من الفولاذ المقاوم للصدأ

Stainless Steel Rectangular Tubing is a hollow structural section with a rectangular cross-section, تستخدم على نطاق واسع في بناء, industrial machinery, السيارات, أثاث, والتطبيقات المعمارية.
Its manufacturing process is designed to ensure قوة عالية, دقة الأبعاد, مقاومة التآكل, ونوعية السطح.

Unlike round tubes, rectangular tubing requires precise forming and finishing techniques to maintain flat walls and sharp corners.

Manufacturing Process of Stainless Steel Rectangular Tubing

1. اختيار المواد

• High-quality stainless steel sheets or coils are selected, عادة الدرجات 304, 304ل, 316, or 316L.

• Chemical composition and thickness are checked for uniformity and corrosion resistance.

2. قص

• Stainless steel sheets are cut to the required width and length for forming into rectangular tubes.

• Precision cutting ensures minimal material waste and accurate dimensions.

3. تشكيل

Rectangular tubing is formed using one of the following processes:

• Roll Forming:

  • The flat sheet is passed through successive rollers that gradually bend it into a rectangular shape.

  • The edges are then prepared for welding.

• Mandrel or Press Forming:

  • For seamless-style rectangular tubing, the tube is shaped using a mandrel or press die to achieve precise corners and wall thickness.

4. لحام (for ERW Tubes)

• Electric Resistance Welding (ERW) is commonly used for rectangular tubes.

• The edges of the formed sheet are welded along the seam using high-frequency current, producing a strong, uniform joint.

• Post-weld, the tube may undergo grinding or polishing to remove weld marks and restore smooth surface quality.

5. المعالجة الحرارية

• Tubing may be solution-annealed to relieve internal stress and enhance corrosion resistance.

• Annealing also improves ductility and dimensional stability.

6. Sizing and Straightening

• Tubes are passed through sizing rolls or stretchers to achieve precise عرض, height, سمك الجدار, and squareness.

• Straightening ensures the tube is flat and free of bends or twists.

7. التشطيب السطحي

• التشطيبات المشتركة تشمل الانتهاء من مطحنة, نحى (satin), أو مصقول (مرآة).

• Pickling and passivation may be applied to remove scale and improve corrosion resistance.

8. Cutting and Inspection

• Tubes are cut to standard or custom lengths.

• Quality checks include سمك الجدار, dimensional tolerances, corner squareness, straightness, والانتهاء من السطح.

Advantages of Stainless Steel Rectangular Tubing

• Uniform wall thickness and consistent mechanical properties

• Strong, flat surfaces for structural or architectural use

• مقاومة عالية للتآكل

• Excellent weldability and formability

• Available in various dimensions and surface finishes