S195T
TUSPIPE strictly follows the EN 10255 S195T standard in every stage of production. Our high-precision S195T steel pipes are engineered to deliver reliable performance for your diverse project needs.
S195T
EN 10255 S195T Carbon steel tubes are also called mild steel tubes. These pipes are manufactured to EN specifications and are commercially known as CS or MS pipes. The hardness of low carbon steel tubes is not as good as that of high carbon steel tubes, but carburizing can increase its surface hardness.
This document describes the criteria for circular non-alloy steel tubes suitable for welding and threading, as well as a variety of alternatives for tube end and coating finishes. This document applies to tubes with specified outside diameters ranging from 10.2 mm to 165.1 mm (thread sizes 1/8 to 6) in two series, medium and heavy, and three types of designated thicknesses.
タスパイプを選ぶ理由
1998年以来、天津聯合鋼管有限公司(TUSPIPE)は高品質のラインパイプの供給に尽力しています。
年間生産能力は50万トンを超え、石油・ガス開発、送電、船舶・自動車建造、水・電気、環境保護、機械工学、インフラ建設など、さまざまな分野・業界にサービスを提供している。
TUSPIPEは製品の品質を重視し、厳格な品質管理を行っている。製品の品質を維持するため、2004年から試験検査センターを設立しました。最新の試験・検査設備を備え、引張試験、水力試験、衝撃試験、DWTTなどを実施することができます。
EN 10255 Grade S195T Properties
The chemical composition of EN 10255 S195T has a considerable impact on its mechanical properties. Among all the elements of S195T. Carbon is a toughening element. Silicon contributes to strength. Manganese is essential austenite stabilizing element that contributes to texture structure creation and increases firmness, strength, and wear resistance. Phosphorus reduces plasticity and toughness, as well as the appearance of cold brittleness. Meanwhile, it may considerably raise the strength of steel and improve the stability of atmospheric corrosion. Sulfur increases the hot brittleness of steel.
Dimensions and Sizes of S195T Steel Pipes
There is a wide range of steel tube dimensions and weight by the European standard EN 10255 “Non-Alloy Steel Tubes Suitable for Welding and Threading” and British Standard BS 1387:1985 “Specification for screwed and socketed steel tubes and tubular, and for plain end steel tubes suitable for welding or screwing to BS 21 pipe threads”. This table allows easy comparison between different types of steel tubes to choose the most suitable one for a particular application. The table shows that the weight of steel tubes can vary significantly, from less than 1 kg/m to more than 30 kg/m. The diameter of the tube also has a significant impact on the weight, with larger diameters generally being thicker and therefore heavier. The table also shows that there are different types of steel tubes available with different thicknesses, which can be selected to suit the required application.
| 指定外径 a D | スレッドaの指定 R | 外径 | H Heavy Series | M Medlum Series | |||||
|---|---|---|---|---|---|---|---|---|---|
| 肉厚 T | 素管の単位長さ当たりの質量 | 肉厚 T | 素管の単位長さ当たりの質量 | ||||||
| マックスだ。 | 分。 | プレーンエンド | ネジ付きとソケット付き | プレーンエンド | ネジ付きとソケット付き | ||||
| (mm） | - | (mm） | (mm） | (mm） | (kg/m） | (kg/m） | (mm） | (kg/m） | (kg/m） |
| 10.2 | 1/8 | 10.6 | 9.8 | 2.6 | 0.487 | 0.490 | 2.0 | 0.404 | 0.407 |
| 13.5 | 1/4 | 14.0 | 13.2 | 2.9 | 0.765 | 0.769 | 2.3 | 0.641 | 0.645 |
| 17.2 | 3/8 | 17.5 | 16.7 | 2.9 | 1.020 | 1.03 | 2.3 | 0.839 | 0.845 |
| 21.3 | 1/2 | 21.8 | 21.0 | 3.2 | 1.44 | 1.45 | 2.6 | 1.21 | 1.22 |
| 26.9 | 3/4 | 27.3 | 26.5 | 3.2 | 1.87 | 1.88 | 2.6 | 1.56 | 1.57 |
| 33.7 | 1 | 34.2 | 33.3 | 4.0 | 2.93 | 2.95 | 3.2 | 2.41 | 2.43 |
| 42.4 | 1 1/4 | 42.9 | 42.0 | 4.0 | 3.79 | 3.82 | 3.2 | 3.1 | 3.13 |
| 48.3 | 1 1/2 | 48.8 | 47.9 | 4.0 | 4.37 | 4.41 | 3.2 | 3.56 | 3.6 |
| 60.3 | 2 | 60.8 | 59.7 | 4.5 | 6.19 | 6.26 | 3.6 | 5.03 | 5.1 |
| 76.1 | 2 1/2 | 76.6 | 75.3 | 4.5 | 7.93 | 8.05 | 3.6 | 6.42 | 6.54 |
| 88.9 | 3 | 89.5 | 88.0 | 5.0 | 10.3 | 10.5 | 4.0 | 8.36 | 8.53 |
| 114.3 | 4 | 115.0 | 113.1 | 5.4 | 14.5 | 14.8 | 4.5 | 12.2 | 12.5 |
| 139.7 | 5 | 140.8 | 138.5 | 5.4 | 17.9 | 18.4 | 5.0 | 16.6 | 17.1 |
| 165.1 | 6 | 166.5 | 163.9 | 5.4 | 21.3 | 21.9 | 5.0 | 19.8 | 20.4 |
| a 指定外径(D)、ねじサイズ(R)、呼び径(DN)の関係については、附属書 A を参照のこと。 T = 指定肉厚。 | |||||||||
Chemical Composition of EN 10255 S195T
| 鋼種 | Chemical composition % | 機械的特性 | ||||||
|---|---|---|---|---|---|---|---|---|
| Upper Yield strength ReH分。 (MPa） | 引張強さ Rm (MPa） | 伸び A min. % | ||||||
| スチール名 | スチール番号 | C マックスだ。 | ムン マックスだ。 | P マックスだ。 | S マックスだ。 | |||
| S 195T | 1.0026 | 0,20 | 1,40 | 0,035 | 0,030 | 195 | 320 to 520 | 20 |
NOTE The steel specified in this document is weldable, however, when subsequently welding tubes produced according to this documented account should be taken of the fact that the behavior of the steel during and after welding is dependent not only on the steel but also on the conditions of preparing for and carrying out the welding.
Mechanical Properties of EN 10255 S195T
| グレード | 機械的特性 | ||
|---|---|---|---|
| S195T | 降伏強度 (Mpa) | 引張強さ (Mpa) | エロンゲーション（%） |
| 195 | 320-520 | 20 | |
Other Properties of S195T
| Preheating Temperature ℃ | Quenching Temperature ℃ | Holding Time min | Hardening Medium | Temper Temperature ℃ | After Tempering Hardness ≥HRC | |
|---|---|---|---|---|---|---|
| Salt-bath Furnace | Controlled Atmosphere Furnace | |||||
| 788 | 1191 | 1204 | 5*15 | Air cooling | 522 | 60 |
Tolerances of S195T Piping
- タイプL - 寸法公差と単位質量
| 指定外径 a D | スレッドaの指定 R | 外径 | 肉厚 T | 素管の単位長さ当たりの質量 | ||
|---|---|---|---|---|---|---|
| マックスだ。 | 分。 | プレーンエンド | ネジ付きとソケット付き | |||
| (mm） | - | (mm） | (mm） | (mm） | (kg/m） | (kg/m） |
| 13.5 | 1/4 | 13.9 | 13.2 | 2.0 | 0.567 | 0.571 |
| 17.2 | 3/8 | 17.4 | 16.7 | 2.0 | 0.750 | 0.756 |
| 21.3 | 1/2 | 21,7 | 21.0 | 2.3 | 1.08 | 1.09 |
| 26.9 | 3/4 | 27.1 | 26.4 | 2.3 | 1.40 | 1.41 |
| 33.7 | 1 | 34.0 | 33.2 | 2.9 | 2.20 | 2.22 |
| 42.4 | 1 1/4 | 42.7 | 41.9 | 2.9 | 2.82 | 2.85 |
| 48.3 | 1 1/2 | 48.6 | 47.8 | 2.9 | 3.25 | 3.29 |
| 60.3 | 2 | 60.7 | 59.6 | 3.2 | 4.51 | 4.58 |
| 76.1 | 2 1/2 | 76.0 | 75.2 | 3.2 | 5.75 | 5.87 |
| 88.9 | 3 | 88.7 | 87.9 | 3.2 | 6.76 | 6.93 |
| 101.6 | 3 1/2 | 101.2 | 100.3 | 3.6 | 8.7 | 8.88 |
| 114.3 | 4 | 113.9 | 113.0 | 3.6 | 9.83 | 10.1 |
| 139.7 | 5 | 140.8 | 138.5 | 4.5 | 15.0 | 15.5 |
| 165.1 | 6 | 166.5 | 163.9 | 4.5 | 17.8 | 18.4 |
| a 指定外径(D)、ねじサイズ(R)、呼び径(DN)の関係については、附属書 A を参照のこと。 T = 指定肉厚。 | ||||||
- タイプL1 - 寸法公差と単位質量
| 指定外径 a D | スレッドaの指定 R | 外径 | 肉厚 T | 素管の単位長さ当たりの質量 | ||
|---|---|---|---|---|---|---|
| マックスだ。 | 分。 | プレーンエンド | ネジ付きとソケット付き | |||
| (mm） | - | (mm） | (mm） | (mm） | (kg/m） | (kg/m） |
| 13.5 | 1/4 | 13.9 | 13.2 | 2.0 | 0.570 | 0.574 |
| 17.2 | 3/8 | 17.4 | 16.7 | 2.0 | 0.742 | 0.748 |
| 21.3 | 1/2 | 21,7 | 21.0 | 2.3 | 1.08 | 1.09 |
| 26.9 | 3/4 | 27.1 | 26.4 | 2.3 | 1.39 | 1.40 |
| 33.7 | 1 | 34.0 | 33.2 | 2.9 | 2.20 | 2.22 |
| 42.4 | 1 1/4 | 42.7 | 41.9 | 2.9 | 2.82 | 2.85 |
| 48.3 | 1 1/2 | 48.6 | 47.8 | 2.9 | 3.24 | 3.28 |
| 60.3 | 2 | 60.7 | 59.6 | 3.2 | 4.49 | 4.56 |
| 76.1 | 2 1/2 | 76.3 | 75.2 | 3.2 | 5.73 | 5.85 |
| 88.9 | 3 | 89.4 | 87.9 | 3.6 | 7.55 | 7.72 |
| 114.3 | 4 | 114.9 | 113.0 | 4.0 | 10.8 | 11.1 |
| a 指定外径(D)、ねじサイズ(R)、呼び径(DN)の関係については、附属書 A を参照のこと。 T = 指定肉厚。 | ||||||
- タイプL2 - 寸法公差と単位質量
| 指定外径 a D | スレッドaの指定 R | 外径 | 肉厚 T | 素管の単位長さ当たりの質量 | ||
|---|---|---|---|---|---|---|
| マックスだ。 | 分。 | プレーンエンド | ネジ付きとソケット付き | |||
| (mm） | - | (mm） | (mm） | (mm） | (kg/m） | (kg/m） |
| 13.5 | 1/4 | 13.6 | 13.2 | 1.8 | 0.515 | 0.519 |
| 17.2 | 3/8 | 17.1 | 16.7 | 1.8 | 0.670 | 0.676 |
| 21.3 | 1/2 | 21.4 | 21.0 | 2.0 | 0.947 | 0.956 |
| 26.9 | 3/4 | 26.9 | 26.4 | 2.3 | 1.38 | 1.49 |
| 33.7 | 1 | 33.8 | 33.2 | 2.6 | 1.98 | 2.00 |
| 42.4 | 1 1/4 | 42.5 | 41.9 | 2.6 | 2.54 | 2.57 |
| 48.3 | 1 1/2 | 48.4 | 47.8 | 2.9 | 3.23 | 3.27 |
| 60.3 | 2 | 60.2 | 59.6 | 2.9 | 4.08 | 4.15 |
| 76.1 | 2 1/2 | 76.0 | 75.2 | 3.2 | 5.71 | 5.83 |
| 88.9 | 3 | 88.7 | 87.9 | 3.2 | 6.72 | 6.89 |
| 114.3 | 4 | 113.9 | 113.0 | 3.6 | 9.75 | 10.0 |
| a 指定外径(D)、ねじサイズ(R)、呼び径(DN)の関係については、附属書 A を参照のこと。 T = 指定肉厚。 | ||||||
- 壁厚
- M、Hシリーズ、Lタイプは±10%；
- -8%、タイプL1およびL2については、プラス許容差は質量許容差に制限される。
- 重量
- 10トン以上のバンドルで±7.5%、MおよびHシリーズ、タイプLの場合；
- タイプL1およびL2の個々の管に+10%、-8%。
- 真直度
真直度は0.002 Lを超えてはならない。
Test and Inspection of S195T Piping
- 引張試験
引張試験は、EN 10002-1に従って素管に対して実施する。
- 曲げテスト
The quality of our welded tubes is of the utmost importance to us. In order to ensure that they meet the highest standards, we perform a bend test in accordance with EN 10232. This test is applied to bare tubes with specified outside diameters of 17.2mm up to and including 60.3mm, and the tube is bent to an angle of 90°. The groove in the forming tool has a width that fits the tube diameter accurately and a depth not less than half of the diameter. The radius at the bottom of the groove of the former is as given in the table below. Welded tubes shall be bent with the weld at the outside of the bend. The tubes shall show no cracks visible without magnifying aids. By performing this test, we can be confident that our welded tubes meet the highest standards of quality.
| 直径 (mm) | 17.2 | 21.3 | 26.9 | 33.7 | 42.4 | 48.3 | 60.3 |
| 曲げ半径 | 50 | 65 | 85 | 100 | 150 | 170 | 220 |
- 平坦化テスト
The flattening test is an essential part of quality control for welded tubes. By applying pressure to the tube until it reaches 75% of its original outside diameter, the test helps to ensure that the welds are strong enough to withstand the required amount of pressure. The test is conducted with the weld placed alternately at 0 or 90° to the direction of flattening, to ensure that all parts of the weld are tested equally. Any cracks or flaws that are visible without magnifying aids are cause for rejection. Once the distance between platens reaches 60% of the original outside diameter, however, slight premature failure at the edges shall not be considered as a cause for rejection. This test helps to ensure that welded tubes meet the high standards required for use in critical applications.
- リーク・タイトネス・テスト
Leak tightness is an important quality for tubes, as even a small leak can cause problems downstream. There are two ways to test for leak-tightness: a hydrostatic test and an electromagnetic test. In a hydrostatic test, the tube is filled with water and pressurized to at least 50 bar for 5 seconds. If there are no leaks, the tube passes the test. An electromagnetic test uses magnetic flux to detect leaks. This method is more sensitive than a hydrostatic test and can detect very small leaks. However, it is also more expensive and less widely available. Manufacturers can choose which test to use, but both methods are effective in testing for leak-tightness.
- 寸法検査
寸法検査を実施しなければならない。
- 目視検査
目視検査は規格に従って実施する。
Marking on S195T Pipes
標示は、管の一端から少なくとも1メートル以内に1回設置し、適切かつ耐久性のある方法で、管に以下の情報を表示しなければならない：
- メーカー名または商標；
- シリアス・シンボル（HまたはM）とタイプ（L、L1、L2）；
- 製造工程の記号（SまたはW）
Colors can be a helpful way to organize and identify different objects, and this is especially true when it comes to tubes. Tubes are often used in a variety of settings, from construction sites to laboratories, and they come in a wide range of sizes and materials. While each type of tube has its unique properties, they all need to be marked so that they can be easily identified. The manufacturer may opt to use color coding instead of series or type markings. This will make it easy to quickly identify the different types of tubes, saving time and preventing confusion. By using colors to mark tubes, manufacturers can help to ensure that they are used safely and correctly.
| 重い | ミディアム | 種類 |
|---|---|---|
| レッド | ブルー | See Tolerance Table |
各束のラベルには、以下の情報を記載すること：
- メーカー名または商標；
- 規格コードEN 10255；
- 製造工程の記号（SまたはW）
- D（外径）またはR（ネジサイズ）；
- シリーズ、タイプ、または指定された肉厚。
Appearance of S195T Pipes
The surface finish of a tube plays an important role in determining its quality. For this reason, manufacturers must take care to ensure that their products are free from defects that can be detected by visual examination. The internal and external surfaces of the tube must be smooth, with no imperfections or marks that would require dressing. Any surface imperfections that encroach on the specified minimum wall thickness are considered defects. It is permissible to dress surface imperfections by grinding or machining provided that the wall thickness in the dressed area is not less than the specified minimum. All dressed areas must blend smoothly into the contour of the tube. By paying close attention to these details, manufacturers can produce high-quality tubes that meet the needs of their customers.
