UOE and JCOE are two advanced ways to produce large diameter longitudinal submerged welded pipe. The form type is different between them.

From the internal&external line welding to the end of square cut, beveled ends, expand

the diameter, Hy test, UT test, X ray test, End test, length measure, weight and marking, 3PE, 3PP Coating etc. two of third is completely the same. Now we study the production process of UOE and JCOE, comparing the differences of production ability(diameter, thickness and production efficiency etc.

1. Forming

UOE Two step: Form U, Form O

JCOE Six step:

Form J, Take Out, Put in J type, Form C, Take Out, Backward bending

2. Production Cost

The cost of JCOE is lower than UOE.

3. Application

UOE pipe specifications

Outside Diameter :Φ508-Φ1118mm (20"-44")

Wall Thickness : 6.4-25.4mm (1/4"-1")

Ouality Standards : API, BS, ASTM , JIS, DIN, GB , ISO, DNV

Length :9-12.2m

JCOE pipe specifications

Outside Diameter :Φ406-Φ1829mm (16"-72")

Wall Thickness :6.0-25.4mm (1/4"-1")

Ouality Standards :API, BS, ASTM , JIS, DIN, GB , ISO, DNV

Length :3-12.2m