Hydraulic and pneumatic Tubes

 Stockist of Hydraulic Tubes, suppliers of Hydraulic Honed Tubes, manufacturer of Stainless Steel Hydraulic Tubes, exporters of Anneled Pickled Hydraulic Tubes, suppliers of St52 Hydraulic Cylinder Tubes, distributor od Hydraulic Honed Tubes, stockist of ST52 Hydraulic Cylinder Tubes, dealers of Din 2391 / Carbon Steel Hydraulic Seamless Tubes

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CHEMTECH ALLOYS PVT stockist of wide range of products and services intended for manufacturers of hydraulics, hydraulic cylinders and hydraulic pressure distributions. Based on the application we can distinguish the following types of tubes.

Tubes for mechanical machining – type HPZ
HPZ tubes are precision seamless tubes for the production of hydraulic cylinders or seals of piston rods. The inner working surface is obtained by mechanical machining, by honing or peeling and subsequent rolling.

Tubes intended for direct use in the cylinders – type HP
HP tubes are seamless tubes with a precisely machined inner surface, which are primarily intended for the manufacture of hydraulic cylinders. The inner working surface is achieved by peeling and subsequent rolling of the inner surface of the tubes.

Tubes intended for piston rods and telescopic cylinders – type HPK
HPK tubes are cold drawn seamless tubes for piston rods, telescopic cylinders and cylinder liners. Use of tube piston rods and pistons is often preferable than the use of solid materials. Use of the tube material, which exhibits the same resistance to load stress, bending and in torsion, means a significant reduction in the weight of the cylinder.

Tubes designated for hydraulic and pneumatic pressure distribution – type HPL
HPL are seamless cold drawn steel tubes that are used in pressure distributions and circuits, in hydraulically and pneumatically operated equipment. The speed and pressure of the medium are significantly changing and these devices have characteristic pressure surges on the inner surface of tubes.

We offer a wide range of tubes for hydraulic and pneumatic circuit within the following parameters:

Dimensions of tubes for hydraulic and pneumatic lines

OUTER DIAMETER (OD) 6.0 – 80.0 mm
WALL THICKNESS (WT) 1.0 – 12.5 mm
EN 10305-4; 
DIN 2391; 2445-2
STN / ČSN 42 6711, 42 6712;
See tube sizes acc. to European standards
ASTM A 822 Tube sizes acc. to ASTM standard
JIS JOHS 102 Tube sizes acc. to JIS standard.

Tolerances of tubes for hydraulic and pneumatic lines

Tolerances of the precision tubes meet the appropriate dimensional table standards. We offers precision tubes with tighter tolerances, i.e. tolerances that are tighter compared with the standard values.

Reduced tolerances for metrical sizes – European standards.

Steel grades of tubes for hydraulic and pneumatic lines

EN 10305-4 E215; E235; E355
Marking system for steel grades according to EN
DIN 2391-2C
DIN 1630
St 35
St 37.4; St 44.4; St 52.4
JIS JOHS 102 OST1; OST2; STPG370; STS370
ASTM A 822 A 822

Chemical composition and mechanical properties of steels acc. to EN, DIN, UNI, BS, NF-A, ASTM, JIS and other standards

Tubes surface protection

(a) oiled outer surface
(b) phosphated outer surface
(c) electrolytically galvanized and chrome-coated outer surface
(d) galvanized and special outer surface

Steel micropurity

According to NFA 04 – 106 or ASTM E45 (JK ranking) max. A4-B2-C2-D2. Upon agreement it is also possible to assign according to EN 10247 or ISO 4967 (A – sulphides, B – alumina, C – silicates, D – oxides). Grain size meets the EN ISO 643 – 5 and finer.

Allowable pressure for hydraulic and pneumatic lines

The highest allowable pressure for hydraulic and pneumatic lines in relationship to steel and tube testing. Calculation was done according to DIN 2413.
Steel 37.4 (E235) without specific testing according to 3.1.B (3.1)
Steel 37.4 (E235) with specific testing according to 3.1.B (3.1)
Steel 52.4 (E355) without specific testing according to 3.1.B (3.1)
Steel 52.4 (E355) with specific testing according to 3.1.B (3.1)

Length of tubes for hydraulic and pneumatic lines

– manufactured length of the tubes is 6 000 mm (length tolerances 0 + 50 mm)
– exact length is in the range of 3 000 – 9 000 mm (length tolerances 0 + 10 mm)

BS Standard

BS Standard DIN Standard  EN Standard GOST Standard JIS Standard UNI Standard
BS 1387 DIN 1629 EN 10083-2 GOST 1060 / 1050 JIS G3445 UNI 5462
BS 1965-1 DIN 1630 / 2445-2 EN 10084 GOST 12132 / 1050 JIS G3454 UNI 5949
BS 3059-1 DIN 1630 EN 10084 GOST 12132 / 19281 JIS G3455 UNI 6363
BS 3059-2 DIN 17100 EN 10208-1 GOST 21729 / 1050 JIS G3456 UNI 663
BS 3601 DIN 17121 EN 10208-2 GOST 21729 / 4543 JIS G3458 UNI 7088
BS 3602-1 DIN 17124 EN 10210-1 GOST 3262 / 1050 JIS G3461 UNI 7287
BS 3603 DIN 17173 EN 10216-1 GOST 550 / 1050 JIS G3462 UNI 7287
BS 3604-1 DIN 17175 EN 10216-2 GOST 550 / 4543 JIS JOHS-102 UNI 7729
BS 3606 DIN 17175 EN 10216-3 GOST 8731 / 1050 UNI 7945
BS 6323-1,3 DIN 17179 EN 10216-4 GOST 8731 / 19281 UNI 8863
BS 6323-1,4 DIN 17200 EN 10224 GOST 8733 / 1050
BS 6323-4 DIN 17204 EN 10253-1 GOST 8733 / 19281
BS 7416 DIN 17210 EN 10253-2 8733 / 4543
DIN 17210 EN 10255 GOST TU 14-3-190 / 1050
DIN 2391-2C / 2445-2 EN 10256-1 GOST TU 14-3-460 / 20072
DIN 2391-2 EN 10294-1 GOST TU 14-3-460 / 4543
DIN 2391 EN 10294-1
DIN 2440 EN 10294-1
DIN 2441 EN 10297-1
DIN 2470-1/1629 EN 10305-1
DIN 2470-2/17172 EN 10305-4
DIN 2470-2/17172
DIN 2609 (A)
DIN 2609 (A)
DIN 2609 (A)
DIN 2609 (B)
DIN 2609 (C)
DIN 2609 (D)
DIN 2609 (E)
DIN 2609 (F,G)
DIN 2609 (H)
DIN 2609(R)
DIN 2609(S)
DIN 2609(T)

Standard of steel tubes.

ASTM A178

ASTM A192

ASTM A209

ASTM A210

ASTM A213

ASTM A214

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ASTM A213 GRADE T2
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ASTM A335 P2 alloy chrome-moly pipe.
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ASTM A335 P9 alloy chrome-moly pipe.
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ASTM A335 P22 alloy chrome-moly pipe.
ASTM A335 P91 alloy  chrome-moly pipe.
ASTM A335 P92 alloy chrome-moly pipe.
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