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Seamless steel tube and pipe |
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These tubes have a wide application in all industrial branches.
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Dimensions
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D < 60.3mmD > 60.3mm |
5~6mmt < 7.1mm 5~6mm or 10~14mmt > 7.1mm 5~6mm |
Kinds of lengths
- production (mm)
- fixed +500mm
- precise - tolerance by agreement
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Straightness |
- 1.5:1000 for tube
- 3:1000 local
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Surface |
Hot finished tubes are not heat treated. Cold finished tubes are delivered as normlized after the final cold finishing process. Surface of tubes corresponds to the method of tube manufacturing.
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| Tubes ends |
The tubes are delivered with plain ends without burrs at the ends of the tube. The tube with wall thickness over 3 (5)mm could be delivered with bevelled ends according to corresponding standards. Upon request ends could be plugged with plastic caps. |
| Testing |
Testing is performed in accordance with corresponding standards. The selection of tests according to standards or by agreement.
- - Leak tightness : eddy current test or Hydrostatic test
- - Non-destructive examination:
| D > 6mm, t>0.5mm |
Eddy current test |
| D > 32mm, t>2mm |
Flux leakage test |
| D > 10mm, t>2mm |
Ultrasonic test |
- - Mecahnical testing and all required tests in accordance with corresponding standards
- - Inspection : see Certified test report
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| Marking |
Tubes are makrd with to the standards or the customer's order. It is possible to deliver the tubes as follows
- - Without marking
- - color strips (Bundle of tubes)
- - White or Black sprayed (Ink Jet)
- - stamping (D>22mm, t>2.3mm)
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| Bundles-are marked with one or more metal or other durable tags with required information. |
| Protective coating |
The tubes are supplied either uncoated or with the manufacturer's standard mill coating at the option of the customer (the subject of agreement between customer and manufacturer) |
| Packaging |
Tubes are packed in round or hexagonal bundles with standard weight of 300~3500kg. When specified in the order it is possible to limit the weight of bundle. Each bundle is bounded with steel strip. The bundles could be protected by PE-foil or jute. Packing into the wooden boxes - only by agreement.
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| Certified test report |
in accordance with DIN50049, EN10204, ASTM(ASME)A450/A530, GOST10692 |
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kinds of report(indicate in standard (EN10204):
- 2.1 Certificate of compliance with the order
- 2.2 Test report
- 2.3 Specific test report
- 3.1 A, 3.1B, 3.1C Inspection certificate
- 3.2 Inspection report
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| Dimensional tables (EN, DIN, BS, UNI, NFA, STN, CSN, GOST, PN-H) |
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| Dimensions and weights of seamless wrought steel pipe according to (ANSI/ASME B36.10M) |
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| Mechanical tubing and tube (ASTM A450/A450M) Standard wire gauges for tube wall thickness |
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| Dimensions and weight of tubes according to standards (ASTM A450/A450M) |
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Seamless tube for boiler and heat exchanger |
| Tubes are made from heat resisting carbon and low-alloy steels resistant against high temperature and pressure loading. this kind of tubes is used for power plant construction such as boiler components, steam superheaters in power plants, heating plants and boiler rooms. |
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Length
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Hot finished tubes |
| D < 60.3mmD > 60.3mm |
5~6mm(16~20ft)t < 7.1mm 5~6mm or 10~13.9mm(16~20 or 32~45ft)t > 7.1mm 5~6mm(16~20ft) |
| Cold finished tubes |
| 4.5~8 m ( by agreement up to 15.8m) |
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Straightness |
- 1.5:1000 for tube
- 3:1000 local
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Final supply conditions and surface condition |
Conditions of tubes corresponds to standards. Hot finished carbon steel tubes are not heat treated. Cold finished tubes and alloy steel tubes are delivered in the normalized or normalized and tempered condition. Surface condition of tubes corresponds to the method of tube manufacturing and method of heat treatment.
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| Tube ends |
- plain ends- bevelled ends according to corresponding standards (DIN, EN, API 5L) 
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| Testing |
Testing is performed in accordance with corresponding standards. The selection of tests according to standards or by agreement.
- - Leak tightness : eddy current test or hydraulic test or another standards.
- - Non-destructive examination:
| D > 6mm, t>0.5mm |
Eddy current test |
| D > 32mm, t>2mm |
Flux leakage test |
| D > 10mm, t>2mm |
Ultrasonic test |
- - Mecahnical test: according to standards.
- - Inspection : see Certified test report
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| Marking |
Tubes - are marked according to the STDs or the customer's order. It is possible to deliver the tubes as follows.
- - Without marking
- - color strips (Bundle of tubes)
- - white or black sprayed (Ink Jet)
- - stamping (D>22mm, t>2.3mm)
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| Bundles-are marked with one or more metal or other durable tags with required information |
| Protective coating |
The tubes are supplied either uncoated or with the manufacturer's standard mill coating at the option of the customer (the subject of agreement between customer and manufacturer). |
| Packaging |
Tubes are packed in round or hexagonal bundles with standard weight of 300~3500kg. When specified in the order it is possible to limit the weight of bundle. Each bundle is bounded with steel strip. The bundles could be protected by PE-foil or jute. Packing into the wooden boxes - only by agreement.
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| Certified test report |
EN 10 204 3.1B 3.1A, 3.1C 3.2 . |
| List of standards |
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| Chemical composition and mechanical properties(Values for information only)
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Heat exchanger tubes for high temperature |
| This kind of precise tube is used mainly for heat exchangers in which energy is transferred from one to another medium. this heat transfer can be combined with or without medium phase change. The tube is used in energetics, chemical industry, at heating and in ari conditioning devices. |
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Dimensions and tolerance
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The dimensions of tubes are given in tables below, The tubes are produced as cold drawn and they are delivered mainly with the tolerance on wall thickness -0 +20%. the tubes with average wall thickness could be delivered upon agreement.
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Surface |
After the final cold drawing the tubes are heat treated in gas. Tube surface is free of scale.
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| Tube ends |
Tube are deliverd with plain and deburred ends. On request they could be protected with plastic caps.
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| Testing |
Each tube is nondestructive tested by eddy current test and after customer specification ultrasonic or hydrostatic test could be used . Other tests are made according to relevant standards.
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| Marking |
Tubemarking with Ink Jet system. Bundles are marked with one or more metal tags with required information.
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| Protective coating |
Outer and inner surface are usually protected with a light flim of oil. Tubes destined to finning operations are usually oiled on the outer surface only, that allow to have a very light film of oil easy to remove.
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| Packing |
Tubes are packed in round or hexagonal bundles, on request the ends of the bundles can be protected with juta or polythene bags. Tubes can be also packed in seaworthy wooden boxes.
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| Certificate test report |
EN 10 204 - 2.2, 3.1B, 3.1A, 3.1C or ASTM/ASME A450 |
| Dimensions and weights of cold-drawn precision steel tube according to (DIN, BS, NF, UNI, EN, GOST)
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| Cold drawn heat exchanger tubes(Sizes in inches, minimum wall thickness)
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| Cold drawn heat exchanger tube(Sizes in inches, average wall thickness)
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| Cold drawn heat exchanger tubes(sizes in mm)
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Dimension and weights of cold drawn steel tubes according to JIS(mm)
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| Dimension and weights of seamless pipes according to JIS(Pipes)
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| Heat exchanger tubes for high temperature (Values for information only |
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They are the semi-manufactured products to be used for production of seamless hot-rolled steel tubes. Blooms are manufactured in the following product range:
이 The tubes are mainly used for assembling of low and mean pressure piping appropriate for water, gas and oil products distribution. They are produced as follows:
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