Welded tubes made from corrosion-resistant steel (stainless)
for manufacturing pipelines
and different designs on GOST 11068-81

Electrowelded tubes made from corrosion-resistant steels for heat
exchangers for sugar industry on TU 14-3-1333-90

Quality of steel

Steel grade	Chemical composition, %
	Ñ	Mn	Si	P	S	Cr	Ni	Mo	Ti
08Cr18Ni10Ti	0,08	2,0	0,8	0,35	0,02	17-19	9-11	-	5 * C-0.7
12Cr18Ni10Ti	0,08	2,0	0,8	0,35	0,02	17-19	9-11	-	5 * C-0.8
ÀISI 304*	0,05	2,0	0,75	0,45	0,03	18-20	8-10	-	-

* Manufacturing of pipes with parameters acc. to GOST 11068-81 and TU 14-3-1333-90,
from s/g AISI 304 and other grades of steel, as agreed of parties.

Assortment of electrowelded pipes from corrosion resistant steel
grades delivered on GOST 11068-81

Outside diameter, mm	Wall thickness, mm
	1.0	1.2	1.4	(1.5)	1.8	2.0	2.2	2.5	2.8	3.0	3.2	3.5	4.0
16
(17)
18
(19)
20
22
25
28
30
32
(33)
34
(35)
36
38
40
42
45
48
50
(51)
53
55
57
60
63
65
70
76
Outside diameter, mm	1.0	1.2	1.4	(1.5)	1.8	2.0	2.2	2.5	2.8	3.0	3.2	3.5	4.0
	Wall thickness, mm

Note:
1. Delivery of pipes of other standard sizes as agreed with a plant - manufacturer.
2. The electrowelded stainless tubes for heat exchangers for sugar industry according
to GOST 14-3-1333-90 are made by the size 33 x 1.5 mm.
3. Maximum length of tubes - 9200 mm.

Technical requirements

Steel grades and GOST	Mechanical properties (not less)			Height of weld reinforcement (flash) on the internal surface of tubes, (mm) not more	Volume of test
	Ultimate rupture strength in Mpa, (kg-force/mm^2)	Yield strength 0,2 Mpa, (kg-force/mm^2) on demand of the customer	Relative elongation, %		Hydrotest or non-destructive test	Geometrical sizes control	Flattening	Flange and flaring	Control of grain size to intergranular corrosion
GOST 11068-81 08Cr18Ni10Ti 12Cr18Ni10Ti AISI 304*