api 5l-api 5l gr.b-api 5l material specification

What is EN 10255?

At UNIASEN, we are proud to present our EN 10255 Carbon Steel Pipe, a top-tier choice for weldable structural steels, specifically engineered for fixed offshore structures. These pipes are designed to endure the harsh conditions of offshore environments, providing a robust and reliable solution for your construction projects. Our EN 10255 Carbon Steel Pipes come in a variety of thicknesses, including S355NLO up to 200 mm, S355MLO, S420MLO, S460MLO, S500MLO up to 120 mm, and S420QLO, S460QLO, S500QLO, S550QLO, S620QLO, S690QLO up to 150 mm. For bespoke project requirements, we can provide thicker dimensions while adhering to the European Standard’s technical specifications. Our pipes are suitable not only for the North Sea Sector but also for other regions, given that local conditions are taken into account.

Specification

Our EN 10255 Carbon Steel Pipes are produced with the utmost attention to detail to meet the highest industry standards. The dimensions are customized to your project specifications, ensuring a seamless fit for your construction requirements. Our production processes follow stringent quality control protocols, ensuring the integrity of the steel grades we provide. We offer a range of surface coatings to improve corrosion resistance, and provide various end types and joint methods to match your specific application. Furthermore, we offer extensive machining services to ensure your pipes are ready for immediate installation upon delivery.

  • Standard: EN10255
  • Procedure: ERW, SMLS,
  • Dimensions: 10.2mm -165.1mm

1/8″ – 6″

DN6 – DN150

  • Thickness: 2mm – 5.4mm

Light-MEDIUM-Heavy series

  • Unit Length: standard 6 or 6.4m

Random 4- 16mtr

  • Steel Grade: S195 T
  • Surface Coating: Varnishing, Oiling, Hot Dip Galvanizing

FBE, 2PP, 3PP, 2PE, 3PE

  • End Type: Square cut, Plain, Bevelled, Threaded, Socket, Grooved
  • Joint Method: Fitting, Flange, Coupling, Clamp, Pipe Shoulder, Welding
  • Pipe Machining: Welding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding

Dimension

At UNIASEN, we recognize that every project has its unique requirements, and we offer a comprehensive range of dimensions for our EN 10255 Carbon Steel Pipes to cater to your specific needs. Our pipes come in thicknesses ranging from S355NLO up to 200 mm, S355MLO, S420MLO, S460MLO, S500MLO up to 120 mm, and S420QLO, S460QLO, S500QLO, S550QLO, S620QLO, S690QLO up to 150 mm. We can also accommodate requests for greater thicknesses, ensuring that your project needs are met without any compromises.

Dimensions, Diameter Tolerance And Mass Per Unit Length
Specified
Outside
Diametera

D
(mm)

Thread
Sizea

R

Outside DiameterH
Heavy Series
M
Medium Series
max.

(mm)

min.

(mm)

Wall
Thickness

T
(mm)

Mass Per Unit
Length Of Bare Tube
Wall
Thickness

T
(mm)

Mass Per Unit
Length Of Bare Tube
Plain End

(kg/m)

Socketed

(kg/m)

Plain End

(kg/m)

Threaded
and
Socketed
(kg/m)
10.21/810.69.82.60.4870.4902.00.4040.407
13.51/414.013.22.90.7650.7692.30.6410.645
17.23/817.516.72.91.021.032.30.8390.845
21.31/221.821.03.21.441.452.61.211.22
26.93/427.326.53.21.871.882.61.561.57
33.7134.233.34.02.932.953.22.412.43
42.41 1/442.942.04.03.793.823.23.103.13
48.31 1/248.847.94.04.374.413.23.563.60
60.3260.859.74.56.196.263.65.035.10
76.12 1/276.675.34.57.938.053.66.426.54
88.9389.588.05.010.310.54.08.368.53
114.34115.0113.15.414.514.84.512.212.5
139.75140.8138.55.417.918.45.016.617.1
165.16166.5163.95.421.321.95.019.820.4
  a For relationship between specified outside diameter (D), thread size (R) and nominal diameter (DN), see Annex A.
T = specified wall thickness.

Chemical Requirement

Our EN 10255 Carbon Steel Pipes are manufactured with a specific chemical composition to ensure optimal performance in offshore environments. The chemical composition is designed to enhance the pipe’s resistance to corrosion, ensuring longevity and durability in challenging conditions. We follow strict quality control measures to ensure that the chemical requirements of the European Standard are met, providing you with a product that delivers exceptional performance and reliability.

Chemical Composition (Cast Analysis) And Mechanical Properties
Steel GradeChemical Composition
%
Mechanical Properties
Upper Yield
Strength

ReH min.
(MPa)

Tensile
Strength

Rm
(MPa)

Elongation

A min.
%

Steel
Name
Steel
Number
C

max

Mn

max

P

max

S

max

S 195T1.00260.201.400.0350.030195320 to 52020

Mechanical Requirement

The mechanical properties of our EN 10255 Carbon Steel Pipes are designed to withstand the rigorous demands of offshore environments. These pipes feature minimum yield strengths up to 690 MPa, along with impact properties at temperatures down to -40 °C. This ensures that our pipes can withstand high stress and extreme temperatures, providing a reliable and durable solution for your offshore construction needs.

Chemical Composition (Cast Analysis) And Mechanical Properties
Steel GradeChemical Composition
%
Mechanical Properties
Upper Yield
Strength

ReH min.
(MPa)

Tensile
Strength

Rm
(MPa)

Elongation

A min.
%

Steel
Name
Steel
Number
C

max

Mn

max

P

max

S

max

S 195T1.00260.201.400.0350.030195320 to 52020

Steel Grades

We offer a variety of steel grades for our EN 10255 Carbon Steel Pipes, including but not limited to S355NLO, S355MLO, S420MLO, S460MLO, S500MLO, S420QLO, S460QLO, S500QLO, S550QLO, S620QLO, and S690QLO. Each grade offers unique properties, allowing you to choose the perfect match for your specific project requirements. Whether you need high yield strength or superior toughness, we have a steel grade that will meet your needs.

Production Tolerance

At UNIASEN, we understand the importance of precision in your construction projects. That’s why we maintain strict production tolerances for our EN 10255 Carbon Steel Pipes. We ensure that the dimensions, chemical composition, and mechanical properties of our pipes are within the specified tolerances of the European Standard. This commitment to precision ensures that you receive a product that meets your exact specifications, providing a reliable and efficient solution for your offshore construction needs.

China ERW Pipe manufacturer

Welded Pipe

ssaw steel pipe manufacturer and supplier

SSAW Steel Pipe

steel hollow section-hollow structural section-Uniasen

Hollow Structural Section

seamless steel pipe-SMLS Pipe

Seamless Steel Pipe

china pipe fitting-carbon steel pipe fittings

Pipe Fittings Pipe Fittings

Fire Sprinkler Pipe

Line Pipe

ASTM A106 Seamless Steel Pipe