Heavy duty sewing machine definition:
Heavy duty sewing machine is designed to extend daily sewing application for thicker material such as jeans, leather and denim, prefer to be included in the type of industrial sewing machine or at least semi-industrial. This kind of sewing machine is typically for purpose of long-lasting durability and dependability.
Heavy duty sewing machine feature:
1. Simple design for stable operation and standard sewing spare part replacement;
2. Automatic micro-lubrication system;
3. High speed stitching, usually the main structure is applying metal frame to support mechanical operation.
Heavy duty sewing machine can sew both thick and light fabric:
Heavy-duty machines can easily stitch through heavy fabrics like jeans, leather and denim. These machines are equipped well enough in industrial standard to sew multi-layers of thick fabric.
Also for light fabric, you can use this kind of machine. So the investment on heavy duty machine will be bigger than single purpose sewing machine only on light fabric.
Heavy duty type sewing machine is equipped more functions such as backstitch device, thread-wiper device, presser foot automatic lifting, etc.
Heavy duty sewing machine vs vintage sewing machine:
Many misunderstanding marketing information can be seen for vintage sewing machine, even we can see some people promoted vintage type as [heavy duty". This is wrong way to promote old sewing machine as heavy duty. Though it`s looking stronger than many modern sewing machines, the structure is not available to sew heavy fabric, at least can not perform beautiful stitches.
Heavy duty sewing machine buying reasons:
Major reason is to sew thicker, heavier, and stronger material. Industrial structure such as top and bottom feed can support the sewing work for denim, leather and canvas. For regular domestic sewing machine can not stitch through multiple layers at the same time. The other reason is to buy heavy duty machines to handle both heavy and semi-heavy fabric at the same time.
heavy duty sewing machine reviews,heavy duty sewing machine with walking foot,heavy duty sewing machine for denim,heavy duty sewing machine for leather and denim,heavy duty sewing machine for jeans DONGGUAN CHUANGHUI SEWING MACHINE CO.,LTD , https://www.ch-sewing.com
ERW 219 Welding tube mill
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Nantong Reliantt offers almost 30 standard models, covering range from 3/8''(8mm) up to 10''(273mm) diameter (corresponding square & rectangular tubes) and wall thickness from 0.3mm up to 12.7mm, also accept customized machines.
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Suitable material: Carbon Steel Coil , Galvanized Steel Coil
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ERW 219 Welding tube mill
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1. Water pipe
2. Heating pipe
3. Low-pressure process pipeline
4. Low pressure fire fighting pipeline
5. Sewage Pipes
6. Steel Scaffolding Pipe
7. Wire and cable protection pipe
8. Structural support Steel Pipe
9. Industrial Steel Pipes
10. Decoration Pipe
11. Oil & Gas Pipes
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Commodity
Tube mills
Round Pipe Size(mm)
89-219mm
Pipe Thickness (mm)
2mm-8 mm
Square Pipe Size(mm)
70mm*70mm-170mm*170mm
Pipe Thickness (mm)
2mm-6 mm
MaterialÂ
Carbon steel coil(GB Q195-Q345); Alloy steel coil; API 5L X42-X80
Pipe Length(m)
6 -12m
Length Tolerance(mm)
±3mm
Line Direction
right or left(from operator's side)
Production Speed(m/min)
 10-50m/min
Low Carbon Steel And Low Alloy Steel:
δb≤550Mpa ,δs≤235Mpa
Technical Flow
 Scroll up→ Uncoil→ Flattening→ Cutting head, tail→ Strip Steel head-tail butt welding→ Looping storage→ Forming→ High-frequency induction welding→ Removing external burr→ Cooling→ Cutting→ Checking & Collecting→ Binding→ Accessing Warehouse.
Tube Bottom Pass line/ Line Power/ Electricity Input Power etc.
 Belong to confidential information and detail parameters will be known in the quotation list.