Coiled pipes

Coiled steel tubes

Production of longitudinally seamed steel pipes.

Diameter [mm].	Wall thickness [mm]
from ø 350 to ø 5000 and above	from 3 to 25

Dimensions

Pipes are supplied with dimensions according to the customer’s order.

Dimensional and shape tolerances

Outside diameter:

Outside diameter in mm	Maximum deviation in mm
ø 350 to 1016	+- ø x 0.5% + 1
ø 1220 – 2220	+- 6
ø 2230 and more	as agreed with the customer

Pipe lengths:

Pipes with Outer Diameter 350-1220 mm – max length 12 m

Pipes with Outer Diameter above 1220 mm – to be agreed

(In order to achieve the required length of the pipe, individual elements are welded together segmentally with circumferential welds. The maximum length of one element is 3 m).

Straightness:

Pipes are visually even. The deviation of straightness is 2 mm per 1 m of length. The total deviation is the sum of the permissible deviations per 1m of pipe, but the value must not exceed:

for lengths up to 6 m 10 mm
for lengths of 6-9 m 15 mm
for a length of 9-12 m 20 mm

Type of welding

Pipes are welded semi-automatically by MIG-131, MAG-135, 125-automatically by submerged arc with powdered wire.

Edges of pipes

straight
beveled

Surface protection

Pipes are delivered:

without protective coating
after sandblasting
with insulation

Additional services:

grinding of welds
installation of additional elements on pipes in the form of flanges, rings, supports, reinforcements, etc.

Testing of pipes

The following tests are carried out:

visual inspection of surface welds,
dimensional inspection,
leakage tests by penetration method,
non-destructive testing of the weld by ultrasonic or radiological testing in acceptance class B, C, D,
other tests can be agreed.

Pipe marking

The following data are stamped on the pipes: manufacturer, dimension, steel grade mark, melt number, pipe production number, welder number.

Documentation

Certificate 3.1 for the sheet in accordance with PN EN 10204

Declaration of conformity to order 2.1 in accordance with PN EN 10204

Test reports

Grades	C	Mn	Si	P max	S max	Cr max	Ni max	Mo	V	Cu	Working temp.	Equivalents
St3S	0,22	1,10	0,10-0,35	0,050	0,050	0,30	0,30	0,10	–	0,35	–	S235JRG2	St37-2
18G2A	0,22	1,00-1,50	0,20-0,55	0,040	0,040	0,30	0,30	–	–	0,30	–	S355J2G3	St52-3
St36K	0,08-0,16	min 0,40	0,15-0,35	0,045	0,045	0,30	0,30	–	–	max 0,30	450	P235GH/HI	1.0345
St41K	0,12-0,20	min 0.45						–	–			P265GH/HII	1.0425
St44K	0,14-0,22	min 0.55						–	–			P285NH	–
K10	max 0,17	min 0,40				0,2	0,35	–	–	max 0,25		St35.8	–
K18	0,16-	min	0,10-					–	–	max 0,25		St45.8	–
16Mo3	0,12-0,20	0,40-0,90	max 0,35	0,030	0,025	0.30 max	0,30	0,25-0,35	–	0,30 max	500	16M	1.5415
13CrMo9-10	0,08-0,18	0,40-1,00	max 0,35			0,70-1,15	–	0,40-0,60	–		550	15HM	1.7335
10CrMo9-10	0,08-0,14	0,40-0,80	0,50			2,0-2,5	–	0,90-1,10	–		580	10H2M	1.7380
11CrMo9-10	0,08-0,15	0,40-0,80	0,50			2,0-2,5	–	0,90-1,10	–		580	–	1.7383