BS 3059

BS-3059-STEEL-PIPE

BS 3059 Steel Pipe

BS 3059 is the renowned standard for Steel boiler and superheater tubes, setting the benchmark for tubes not exceeding 127 mm in outside diameter and 12.5 mm in thickness. This standard, published by The British Standards Institution (BSI), the esteemed national standards body of the United Kingdom, ensures that you receive tubes of the highest quality. With UNIACERO, you can be assured of steel pipes that meet the stringent requirements of BS 3059, including specified room temperature properties. Our commitment to excellence ensures that our products are not only robust and durable but also adhere to the highest standards of production and quality control.

BS 3059 Specification

Our BS 3059 steel pipes come in various specifications, ensuring a wide range of options for our clients. These include Carbon/Alloy Seamless Steel Pipe, ERW/LSAW/DSAW Steel Pipe, and Spirally Welded Steel Pipe. Each pipe is meticulously crafted, ensuring precision in dimensions, production procedures, steel grades, surface coatings, end types, joint methods, and machining services. With UNIACERO, you get a product that is not just compliant with international standards but also tailored to your specific needs.

Production StandardBS3059
Manufacturing ProcessesHFS (Hot finished seamless)
CFS(Cold finished seamless)
ERW(Electric resistance welded including induction welded)
CEW(Cold finished electric resistance welded including induction welded)
Outside DiameterOD ≤127mm
Wall ThicknessW.T.≤12.5mm
Pipe Length3 – 12 mtrs meters
Steel Grade320 Seamless
320 Welded
Corrosion PreventionLacquer, Varnish, Oiling, Galvanizing
FBE, 2LPP, 3LPP, 2LPE, 3LPE
End ProcessesSquare Cut, Bevelling, Threading, Grooving , Shouldering
Further ProcessingWelding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding

BS 3059 Dimension Table

schematic-diagram-of-pipe-dimension

The dimensions of our BS 3059 steel pipes are meticulously crafted to precision. With an outer diameter ranging from 19.05-114.3mm and a wall thickness between 2-14mm, our pipes are designed to fit a variety of applications. The maximum length we offer is 16m, ensuring that you have ample length for any project. Every dimension is carefully calibrated to ensure optimal performance and durability.

Outside DiameterTube Thickness (mm)
mm2.02.32.62.93.23.64.04.55.05.66.37.18.08.810.011.012.5
25.4
26.9
31.8
33.7
38
42.4
44.5
48.3
51
57
60.3
63.5
70
76.1
82.5
88.9
101.6
114.3
127

Chemical Requirements of BS 3059

At UNIACERO, we understand the importance of the chemical composition in steel pipes. Our BS 3059 steel pipes are manufactured with a precise chemical composition, ensuring high resistance to corrosion, enhanced durability, and optimal performance. Each pipe undergoes rigorous testing to ensure that it meets the stringent chemical requirements set by the BS 3059 standard.

Steel gradeMethod of manufactureChemical composition (ladle analysis) (see notes 1 and 2)Mechanical properties at room temperature (see note 3)
CMnSiPSReRmAFlattening test constant CDrift expanding test: increase in D
max.min.max.min.max.max.max.min.min.max.min.d/D ratio
≤ 0.6>0.6 ≤ 0.8>0.8
%%%%%%%N/mm2aN/mm2N/mm2%%%%
320Seamless Welded0.160.300.700.100.350.040.04195320480250.10121519
320Seamless Welded0.16b0.300.700.350.040.04195320480250.10121519
  • NOTE 1 Elements not quoted in the table are not intentionally added other than for the purpose of finishing the heat.
  • NOTE 2 For permissible deviations on product analysis, see Table 3.
  • NOTE 3 Re is the yield strength. For acceptance purposes either the upper yield stress ReH or the 0.5 % proof stress (total elongation)Rt0.5 may be used (see 13.1).
  • Rm is the tensile strength.
  • A is the percentage elongation after fracture on a gauge length Lo = 5.65 √So . (So is the original cross-sectional area of the gauge length.)
  • d is the inside diameter.
  • D is the outside diameter.
  • a 1 N/mm2 = 1 MPa.
  • b For rimmed or semi-killed steel the C max. is 0.19 %.

Mechanical Requirements of BS 3059

Mechanical properties are crucial for the performance of steel pipes. Our BS 3059 pipes boast a Tensile Strength of 360-500 Mpa and a Yield Strength of 235 Mpa. With an elongation of 24 and a flatten coefficient of 0.1, our pipes are designed to withstand high pressures and temperatures, ensuring longevity and reliability in any application.

Steel gradeMethod of manufactureChemical composition (ladle analysis) (see notes 1 and 2)Mechanical properties at room temperature (see note 3)
CMnSiPSReRmAFlattening test constant CDrift expanding test: increase in D
max.min.max.min.max.max.max.min.min.max.min.d/D ratio
≤ 0.6>0.6 ≤ 0.8>0.8
%%%%%%%N/mm2aN/mm2N/mm2%%%%
320Seamless Welded0.160.300.700.100.350.040.04195320480250.10121519
320Seamless Welded0.16b0.300.700.350.040.04195320480250.10121519
  • NOTE 1 Elements not quoted in the table are not intentionally added other than for the purpose of finishing the heat.
  • NOTE 2 For permissible deviations on product analysis, see Table 3.
  • NOTE 3 Re is the yield strength. For acceptance purposes either the upper yield stress ReH or the 0.5 % proof stress (total elongation)Rt0.5 may be used (see 13.1).
  • Rm is the tensile strength.
  • A is the percentage elongation after fracture on a gauge length Lo = 5.65 √So . (So is the original cross-sectional area of the gauge length.)
  • d is the inside diameter.
  • D is the outside diameter.
  • a 1 N/mm2 = 1 MPa.
  • b For rimmed or semi-killed steel the C max. is 0.19 %.

Steel Grades in BS 3059

We offer a diverse range of steel grades to cater to the varied needs of our clients. Whether you require low tensile carbon steel tubes or carbon, alloy, and austenitic stainless steel tubes with specified elevated temperature properties, UNIACERO has got you covered. Each grade is carefully selected to ensure optimal performance and longevity.

Production Tolerance of BS 3059

Precision is key in the production of steel pipes. At UNIACERO, we adhere to strict production tolerances to ensure that each pipe meets the exact specifications of our clients. Our cold-drawn pipes have a tolerance of +/-0.1mm, while our cold-rolled pipes have a tolerance of +/-0.05mm. With us, you can be assured of products that are not only of the highest quality but also precisely tailored to your needs.

Cold finished electric resistance welded including induction welded (CEW)


Outside diameter: + 0.5 % with a minimum tolerance of + 0.10 mm

Thickness:+ 7.5 %

Outside diameter, thickness and size of weld upset

The toleranceg on outside diameter shall include ovality and those on thickness shall include eccentricity.

a) Hot finished seamless (HFS)

Outside diameter: ± 1 % with a minimum tolerance of : ±0.50 mm

Thickness: ± 12.5 %

b) Cold finished seamless (CFS)

Outside diameter: ±0.5 % with a minimum tolerance of ± 0.10 mm

Thickness:  ± 7.5 %

c) Electric resistance welded including induction welded (ERW)

Outside diameter: ±0.75 % with a minimum tolerance of : ±0.30 mm

Thickness: up to and including 3.2 mm ± 10 %

over 3.2 mm ± 7.5 %


10.3 Length

Unless otherwise specified by the purchaser [see 2.2 e)] tubes shall be supplied as random lengths.

NOTE The actual range of the random lengths may be the subjcet of agreement between the mnnufneturer and the purchnser.

Where the length is specified as “exact length” or “cut length” the permissible deviation shall be + 6,- 0 mm for lengths up to and including 6 m.

For every 3 m increase in length above 6 m, the plus tolerance shall be increased by 1.5 mm with a maximum of 12.0 mm.

Our Advantages

  1. Over 25 years of experience in pipeline production and installation.
  2. Comprehensive inspection equipment.
  3. Independent product serial numbers for traceability.
  4. Advanced production equipment – Seamer high-frequency welding machine from the United States.
  5. Complete qualifications – API 5L/API 5CT/FM/UL fire pipe certification, etc.
  6. Wide range of products – independently developed solar torque tubes, highly favored in the European market.
  7. Customers spread across the globe.
  8. Excellent after-sales service and sense of responsibility.

Application Scenarios

Our steel pipes are engineered to withstand high temperatures, corrosive environments, and varying pressures, ensuring reliability and safety in the complex petrochemical processes. 

Whether it’s transferring crude oil, natural gas, or chemical intermediates, the robustness and versatility of steel pipes make them indispensable components of the plant’s infrastructure, contributing to efficient production and maintenance of stringent safety standards.

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