{"id":2262,"date":"2022-04-07T08:29:40","date_gmt":"2022-04-07T08:29:40","guid":{"rendered":"https:\/\/tuspipe.com\/?page_id=2262"},"modified":"2025-11-10T02:15:24","modified_gmt":"2025-11-10T02:15:24","slug":"en-10255","status":"publish","type":"page","link":"https:\/\/www.tuspipe.com\/standards\/en-10255\/","title":{"rendered":"EN 10255"},"content":{"rendered":"\t\t
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EN 10255<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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TUSPIPE strictly adheres to the EN 10255 standard in its steel pipe production process. Our meticulously designed EN 10255 steel pipes meet a wide range of customer needs, providing you with high-precision EN 10255 steel pipes.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"shows-en-10255-steel-pipe\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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EN 10255<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The EN 10255<\/a> standard is a European standard that helps to ensure the safety and quality of non-alloy steel tubes that are welded or threaded.<\/strong> This standard includes a variety of choices for finishing tube ends and coatings, which helps to protect the tubing from damage during transport and use. The EN 10255 standard also specifies the minimum wall thickness for each type of tubing, which helps to prevent weak or damaged tubing from being used in construction projects. In addition, the tubes shall be manufactured by a seamless (S) or longitudinally welded (W) process. By following this standard, manufacturers can help to ensure that their products meet the highest quality standards.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Why choose tuspipe?<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Since 1998, Tianjin United Steel Piping Co., Ltd (TUSPIPE) has been committed to supplying high-quality line pipes.<\/p>\n

With over 500,000 tons annual production capacity, the company serves various fields and industries, such as oil & gas exploitation and transmission, ship & auto-building, water & electricity, environmental protection, mechanical engineering, infrastructure construction and etc.<\/p>\n

TUSPIPE places a premium on product quality and rigorous product quality control. In order to maintain good product quality,  the company has established a Test & Inspection Center since 2004. With a series of state-of-the-art tests and inspection equipment, the test & inspection center is able to perform the tensile tests, hydro tests, impact tests, DWTT, etc.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Steel Grades of EN 10255 Pipes<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Dimensions and Sizes of EN 10255 Steel Pipes<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The following table contains the dimensions and weight of steel tubes in accordance with 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 tubulars, and for plain end steel tubes suitable for welding or screwing to BS 21 pipe threads”:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Nominal Bore<\/th>\nOutside Diameter<\/th>\nThickness<\/th>\nWeight<\/th>\n<\/tr>\n
Light<\/th>\nMedium\/\nHeavy<\/th>\nLight<\/th>\nMedium<\/th>\nHeavy<\/th>\nLight<\/th>\nMedium<\/th>\nHeavy<\/th>\n<\/tr>\n
Inch<\/th>\nmm<\/th>\nmm<\/th>\nmm<\/th>\nmm<\/th>\nmm<\/th>\nmm<\/th>\nkg\/m<\/th>\nkg\/m<\/th>\nkg\/m<\/th>\n<\/tr>\n
\u00a01\/4<\/td>\n8<\/td>\n13.6<\/td>\n13.9<\/td>\n1.8<\/td>\n2.3<\/td>\n2.9<\/td>\n0.515<\/td>\n0.641<\/td>\n0.765<\/td>\n<\/tr>\n
\u00a03\/8<\/td>\n10<\/td>\n17.1<\/td>\n17.4<\/td>\n1.8<\/td>\n2.3<\/td>\n2.9<\/td>\n0.67<\/td>\n0.839<\/td>\n1.02<\/td>\n<\/tr>\n
\u00a01\/2<\/td>\n15<\/td>\n21.4<\/td>\n21.7<\/td>\n2<\/td>\n2.6<\/td>\n3.2<\/td>\n0.947<\/td>\n1.21<\/td>\n1.44<\/td>\n<\/tr>\n
\u00a03\/4<\/td>\n20<\/td>\n26.9<\/td>\n27.2<\/td>\n2.3<\/td>\n2.6<\/td>\n3.2<\/td>\n1.38<\/td>\n1.56<\/td>\n1.87<\/td>\n<\/tr>\n
1<\/td>\n25<\/td>\n33.8<\/td>\n34.2<\/td>\n2.6<\/td>\n3.2<\/td>\n4<\/td>\n1.98<\/td>\n2.41<\/td>\n2.94<\/td>\n<\/tr>\n
1 1\/4<\/td>\n32<\/td>\n42.5<\/td>\n42.9<\/td>\n2.6<\/td>\n3.2<\/td>\n4<\/td>\n2.54<\/td>\n3.1<\/td>\n3.8<\/td>\n<\/tr>\n
1 1\/2<\/td>\n40<\/td>\n48.4<\/td>\n48.8<\/td>\n2.9<\/td>\n3.2<\/td>\n4<\/td>\n3.23<\/td>\n3.57<\/td>\n4.38<\/td>\n<\/tr>\n
2<\/td>\n50<\/td>\n60.2<\/td>\n60.8<\/td>\n2.9<\/td>\n3.6<\/td>\n4.5<\/td>\n4.08<\/td>\n5.03<\/td>\n6.19<\/td>\n<\/tr>\n
2 1\/2<\/td>\n65<\/td>\n76<\/td>\n76.6<\/td>\n3.2<\/td>\n3.6<\/td>\n4.5<\/td>\n5.71<\/td>\n6.43<\/td>\n7.93<\/td>\n<\/tr>\n
3<\/td>\n80<\/td>\n88.7<\/td>\n89.5<\/td>\n3.2<\/td>\n4<\/td>\n5<\/td>\n6.72<\/td>\n8.37<\/td>\n10.3<\/td>\n<\/tr>\n
4<\/td>\n100<\/td>\n113.9<\/td>\n114.9<\/td>\n3.6<\/td>\n4.5<\/td>\n5.4<\/td>\n9.75<\/td>\n12.2<\/td>\n14.5<\/td>\n<\/tr>\n
5<\/td>\n125<\/td>\n–<\/td>\n140.6<\/td>\n–<\/td>\n5<\/td>\n5.4<\/td>\n–<\/td>\n16.6<\/td>\n17.9<\/td>\n<\/tr>\n
6<\/td>\n150<\/td>\n–<\/td>\n165.1<\/td>\n–<\/td>\n5<\/td>\n5.4<\/td>\n–<\/td>\n19.7<\/td>\n21.3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Chemical Composition of EN 10255 Pipes<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Grade<\/th>\nChemical composition (%)<\/th>\n<\/tr>\n
S195T<\/td>\nC<\/td>\nMn<\/td>\nP<\/td>\nS<\/td>\n<\/tr>\n
\u2264 0.20<\/td>\n\u2264 1.40<\/td>\n\u2264 0.035<\/td>\n\u2264 0.030<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Mechanical Properties of EN 10255 Pipes<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Grade<\/strong><\/th>\nMechanical Properties<\/strong><\/th>\n<\/tr>\n
S195T<\/td>\nYield Strength (Mpa)<\/td>\nTensile Strength (Mpa)<\/td>\nElongation (%)<\/td>\n<\/tr>\n
195<\/td>\n320-520<\/td>\n20<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Tolerances of EN 10255 Piping<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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- Type L - Dimension Tolerance and Unit Mass<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Specified Outside Diameter a\nD<\/th>\nDesignation of Thread a\nR<\/th>\nOutside Diameter<\/th>\nWall Thickness\nT<\/th>\nMass per Unit Length of Bare Tube<\/th>\n<\/tr>\n
max.<\/th>\nmin.<\/th>\nPlain End<\/th>\nThreaded and Socketed<\/th>\n<\/tr>\n
(mm)<\/th>\n–<\/th>\n(mm)<\/th>\n(mm)<\/th>\n(mm)<\/th>\n(kg\/m)<\/th>\n(kg\/m)<\/th>\n<\/tr>\n
13.5<\/td>\n1\/4<\/td>\n13.9<\/td>\n13.2<\/td>\n2.0<\/td>\n0.567<\/td>\n0.571<\/td>\n<\/tr>\n
17.2<\/td>\n3\/8<\/td>\n17.4<\/td>\n16.7<\/td>\n2.0<\/td>\n0.750<\/td>\n0.756<\/td>\n<\/tr>\n
21.3<\/td>\n1\/2<\/td>\n21,7<\/td>\n21.0<\/td>\n2.3<\/td>\n1.08<\/td>\n1.09<\/td>\n<\/tr>\n
26.9<\/td>\n3\/4<\/td>\n27.1<\/td>\n26.4<\/td>\n2.3<\/td>\n1.40<\/td>\n1.41<\/td>\n<\/tr>\n
33.7<\/td>\n1<\/td>\n34.0<\/td>\n33.2<\/td>\n2.9<\/td>\n2.20<\/td>\n2.22<\/td>\n<\/tr>\n
42.4<\/td>\n1 1\/4<\/td>\n42.7<\/td>\n41.9<\/td>\n2.9<\/td>\n2.82<\/td>\n2.85<\/td>\n<\/tr>\n
48.3<\/td>\n1 1\/2<\/td>\n48.6<\/td>\n47.8<\/td>\n2.9<\/td>\n3.25<\/td>\n3.29<\/td>\n<\/tr>\n
60.3<\/td>\n2<\/td>\n60.7<\/td>\n59.6<\/td>\n3.2<\/td>\n4.51<\/td>\n4.58<\/td>\n<\/tr>\n
76.1<\/td>\n2 1\/2<\/td>\n76.0<\/td>\n75.2<\/td>\n3.2<\/td>\n5.75<\/td>\n5.87<\/td>\n<\/tr>\n
88.9<\/td>\n3<\/td>\n88.7<\/td>\n87.9<\/td>\n3.2<\/td>\n6.76<\/td>\n6.93<\/td>\n<\/tr>\n
101.6<\/td>\n3 1\/2<\/td>\n101.2<\/td>\n100.3<\/td>\n3.6<\/td>\n8.7<\/td>\n8.88<\/td>\n<\/tr>\n
114.3<\/td>\n4<\/td>\n113.9<\/td>\n113.0<\/td>\n3.6<\/td>\n9.83<\/td>\n10.1<\/td>\n<\/tr>\n
139.7<\/td>\n5<\/td>\n140.8<\/td>\n138.5<\/td>\n4.5<\/td>\n15.0<\/td>\n15.5<\/td>\n<\/tr>\n
165.1<\/td>\n6<\/td>\n166.5<\/td>\n163.9<\/td>\n4.5<\/td>\n17.8<\/td>\n18.4<\/td>\n<\/tr>\n
a For relationship between specified outside diameter (D), thread size (R) and nominal diameter (DN), see Annex A.\nT = specified wall thickness.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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- Type L1 - Dimension Tolerance and Unit Mass<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Specified Outside Diameter a\nD<\/th>\nDesignation of Thread a\nR<\/th>\nOutside Diameter<\/th>\nWall Thickness\nT<\/th>\nMass per Unit Length of Bare Tube<\/th>\n<\/tr>\n
max.<\/th>\nmin.<\/th>\nPlain End<\/th>\nThreaded and Socketed<\/th>\n<\/tr>\n
(mm)<\/th>\n–<\/th>\n(mm)<\/th>\n(mm)<\/th>\n(mm)<\/th>\n(kg\/m)<\/th>\n(kg\/m)<\/th>\n<\/tr>\n
13.5<\/td>\n1\/4<\/td>\n13.9<\/td>\n13.2<\/td>\n2.0<\/td>\n0.570<\/td>\n0.574<\/td>\n<\/tr>\n
17.2<\/td>\n3\/8<\/td>\n17.4<\/td>\n16.7<\/td>\n2.0<\/td>\n0.742<\/td>\n0.748<\/td>\n<\/tr>\n
21.3<\/td>\n1\/2<\/td>\n21,7<\/td>\n21.0<\/td>\n2.3<\/td>\n1.08<\/td>\n1.09<\/td>\n<\/tr>\n
26.9<\/td>\n3\/4<\/td>\n27.1<\/td>\n26.4<\/td>\n2.3<\/td>\n1.39<\/td>\n1.40<\/td>\n<\/tr>\n
33.7<\/td>\n1<\/td>\n34.0<\/td>\n33.2<\/td>\n2.9<\/td>\n2.20<\/td>\n2.22<\/td>\n<\/tr>\n
42.4<\/td>\n1 1\/4<\/td>\n42.7<\/td>\n41.9<\/td>\n2.9<\/td>\n2.82<\/td>\n2.85<\/td>\n<\/tr>\n
48.3<\/td>\n1 1\/2<\/td>\n48.6<\/td>\n47.8<\/td>\n2.9<\/td>\n3.24<\/td>\n3.28<\/td>\n<\/tr>\n
60.3<\/td>\n2<\/td>\n60.7<\/td>\n59.6<\/td>\n3.2<\/td>\n4.49<\/td>\n4.56<\/td>\n<\/tr>\n
76.1<\/td>\n2 1\/2<\/td>\n76.3<\/td>\n75.2<\/td>\n3.2<\/td>\n5.73<\/td>\n5.85<\/td>\n<\/tr>\n
88.9<\/td>\n3<\/td>\n89.4<\/td>\n87.9<\/td>\n3.6<\/td>\n7.55<\/td>\n7.72<\/td>\n<\/tr>\n
114.3<\/td>\n4<\/td>\n114.9<\/td>\n113.0<\/td>\n4.0<\/td>\n10.8<\/td>\n11.1<\/td>\n<\/tr>\n
a For relationship between specified outside diameter (D), thread size (R) and nominal diameter (DN), see Annex A.\nT = specified wall thickness.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

- Type L2 - Dimension Tolerance and Unit Mass<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Specified Outside Diameter\u00a0a\nD<\/th>\nDesignation of Thread\u00a0a\nR<\/th>\nOutside Diameter<\/th>\nWall Thickness\nT<\/th>\nMass per Unit Length of Bare Tube<\/th>\n<\/tr>\n
max.<\/th>\nmin.<\/th>\nPlain End<\/th>\nThreaded and Socketed<\/th>\n<\/tr>\n
(mm)<\/th>\n–<\/th>\n(mm)<\/th>\n(mm)<\/th>\n(mm)<\/th>\n(kg\/m)<\/th>\n(kg\/m)<\/th>\n<\/tr>\n
13.5<\/td>\n1\/4<\/td>\n13.6<\/td>\n13.2<\/td>\n1.8<\/td>\n0.515<\/td>\n0.519<\/td>\n<\/tr>\n
17.2<\/td>\n3\/8<\/td>\n17.1<\/td>\n16.7<\/td>\n1.8<\/td>\n0.670<\/td>\n0.676<\/td>\n<\/tr>\n
21.3<\/td>\n1\/2<\/td>\n21.4<\/td>\n21.0<\/td>\n2.0<\/td>\n0.947<\/td>\n0.956<\/td>\n<\/tr>\n
26.9<\/td>\n3\/4<\/td>\n26.9<\/td>\n26.4<\/td>\n2.3<\/td>\n1.38<\/td>\n1.49<\/td>\n<\/tr>\n
33.7<\/td>\n1<\/td>\n33.8<\/td>\n33.2<\/td>\n2.6<\/td>\n1.98<\/td>\n2.00<\/td>\n<\/tr>\n
42.4<\/td>\n1 1\/4<\/td>\n42.5<\/td>\n41.9<\/td>\n2.6<\/td>\n2.54<\/td>\n2.57<\/td>\n<\/tr>\n
48.3<\/td>\n1 1\/2<\/td>\n48.4<\/td>\n47.8<\/td>\n2.9<\/td>\n3.23<\/td>\n3.27<\/td>\n<\/tr>\n
60.3<\/td>\n2<\/td>\n60.2<\/td>\n59.6<\/td>\n2.9<\/td>\n4.08<\/td>\n4.15<\/td>\n<\/tr>\n
76.1<\/td>\n2 1\/2<\/td>\n76.0<\/td>\n75.2<\/td>\n3.2<\/td>\n5.71<\/td>\n5.83<\/td>\n<\/tr>\n
88.9<\/td>\n3<\/td>\n88.7<\/td>\n87.9<\/td>\n3.2<\/td>\n6.72<\/td>\n6.89<\/td>\n<\/tr>\n
114.3<\/td>\n4<\/td>\n113.9<\/td>\n113.0<\/td>\n3.6<\/td>\n9.75<\/td>\n10.0<\/td>\n<\/tr>\n
a\u00a0For relationship between\u00a0specified\u00a0outside diameter\u00a0(D),\u00a0thread\u00a0size (R) and\u00a0nominal diameter (DN),\u00a0see\u00a0Annex A.\nT = specified wall thickness.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

- Wall Thickness<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t