Difference between large diameter coil pipe Welded pipe Spiral pipe

Spiral pipe, coil pipe, welded pipe although refers to a product, but the specific meaning is different.
 
The difference between large diameter coil pipe / welded pipe / spiral pipe:

Spiral pipe mainly refers to the spiral, spiral pipe production process is the use of steel plate spiral bending, welding and become.
Coiled pipe mainly refers to the coil, in addition to spiral pipe, there are also straight seam welded pipe is also curled from the steel pipe. This shows that the coiled pipe can be divided into: spiral welded pipe and straight seam welded pipe.
Welded pipe mainly refers to welding, welding in a variety of ways, in addition to seamless steel pipe, the basic other steel pipe is welded. Divided into spiral welded pipe, straight seam welded pipe, d-beam welded pipe and so on.
 
From the attribution aspect, spiral pipe belongs to a kind of coil pipe, also belongs to a kind of welded pipe. Spiral pipe is the most important coil pipe, welded pipe products, but not all.