
EN10219-1 EN10219-2 Cold Formed Welded Structural Hollow Sections of Non-Alloy and Fine Grain Steels
Part 1: Technical delivery condition
Part 2: Tolerances, Dimensions and Sectional Properties
Structural hollow section manufacturing process:
Structural hollow sections are manufactured by electric welding or submerged arc welding without subsequent heat treatment. Hollow sections manufactured by a continuous process shall not incude the welds used to join the lengths of strip prior to forming the hollow section, except that for helically welded submerged arc-welded (SAW) hollow sections, such welds shall be permitted when tested in accordance with 9.4.3.0 EN10219-1, EN10291-2.
Delivery conditions:
The hollow sections are delivered cold formed without subsequent heat treatment except that weld seam maybe in the as welded or heat treated condition
NOTE: For SAW hollow sections above 508 mm outside diameter it may be necessary to perform a warm shaping operation, which does not affect the mechanical properties, in order to meet the out-of-roundness tolerance requirements.
Suitability for hot dip galvanization:
The products are suitbale for hot dip galvanization.
TABLE 1 Tolerances
Symbol | Unit | Definition |
B | mm | Nominal length of side of square hollow section.Nominal length of the shorter side of a rectangular hollow section |
C1/C2 | mm | Length of corner region of a square or rectangular hollow section |
Dmax/Dmin | mm | The maximum and minimum outside diameter of a circular hollow section measured in the same plane |
H | mm | Nominal length of the longer side of a rectangular hollow section |
M | Kg/m | Mass per unit length |
T | mm | Nominal thickness |
O | % | Out-of-roundness |
T | mm | Nominal thickness |
V | mm | Total measured twist |
TABLE 2 Tolerances
Characteristic | Circular hollow sections | Square and rectangular hollow sections | |
Outside dimensions (D,B andH) | ±1% with a minimum of ±0.5mm and a maximum of ±10mm | Side length (mm) | Tolerance |
H,B <100 100≤H,B≤200 H,B>200 | ±1% with a minimum of ±0.5mm ±0.8% ±0.6% | ||
Thickness(T) | For D≤406.4mm: T≤5mm ±10% T>5mm ±0.50mm For D>406.4mm: ±10% with a maximum of 2mm | T≤5mm ±10% T>5mm ±0.50mm | |
Out-of-roundness(O) | 2% for hollow sections having a diameter to thickness ratio not exceeding 100① | —— | |
Concavity/convexity② | —— | Max. 0.8% with a minimum of 0.5mm | |
Squareness of side | —— | 90° ±1° | |
External corner profile | —— | See table 3 | |
Twist(V) | —— | 2mm plus 0.5mm/m length | |
Straightness | 0.20% of total length | 0.15% of total length | |
Mass(M) | ±6% on individual lengths |
①Where the diameter to thickness ratio exceeds 100 the tolerance on out-of-roundness shall be agreed.
②The tolerance on convexity and concavity is independent of the tolerance on outside dimensions.
TABLE 3 External Corner Profile
Thickness T mm | External Corner Profile C1,C2,or R1 mm |
T≤6 6<T≤10 10<T | 1.6T to 2.4T 2.0T to 3.0T 2.4T to 3.6T |
The sides need not be tangential to the corner arcs.
TABLE 4 Tolerances on length①
Type of length | Range in mm | Tolerance |
Random length | 4000 to 16000 with a range of 2000 per order item | 10% of sections supplied may be below the minimum for the ordered range but not less than 75% of the minimum of the range |
Approximate length | ≥4000 | ﹢50mm 0 |
Exact length | <6000 ≥6000 to ≤10000 >10000 | ﹢5mm 0 ﹢15mm 0 ﹢5mm +1mm/m 0 |
①The purchaser shall indicate in the enquiry and order the type of length required and the length range or length required.
TABLE 5 Tolerances on height of internal and external weld bead for submerged arc welded hollow sections
Thickness(T) | Maximum weld bead height(mm) |
≤14.2 >14.2 | 3.5 4.8 |
Products forms:
CFCHS = cold formed circular hollow section
CFRHS = cold formed square or rectangular hollow section
Charecteristics:
- Tolerances on dimensions and shapes
- Elongation
- Tensile strength
- Yield strength
- Impact strength
- weldability (chemical composition)
Normative references:
EN287-1, Qualification test of welders - Fusion welding - Part 1: Steels
EN10020-1, Metallic materials - Tensile testing - Part 1: Method of test at ambient temperature
EN10020:2000, Definition and classification of grades of steel
EN10021:1983, General technical delivery requirements for steel and iron products
EN10027-1, Designation systems for steels - Part 1: Steel names
EN10027-2, Designation systems for steels - Part 2: Numericl systems
EN10045-1, Metallic materials - Charpy impact test - Part 1: Test method
EN10052:1993, Vocabulary of heat treatment terms for ferrous products
EN10168, Steel products - Inspection documents - List of information and description
EN10204, Metallic products - Types of inspection and description
EN10219-2:2006, Cold formed welded structural hollow sections of non-alloy and fine grains steels - Part 2: Tolerances, dimensions and sectional properties
EN10246-3, Non-destructive testing of steel tubes - Part 3: Automatic eddy current testing of seamless and welded ( except submerged arc welded ) steel tubes for the detection of imperfections.
EN10246-5, Non-destructive testing of steel tubes - Part 5: Automatic full peripheral magnetic transducer/flux leakage testing of seamless and welded ( except submerged arc welded) ferromagnetic steel tubes for the detection of longitudinal imperfections
EN10246-8, Non-destructive testing of steel tubes - Part 8: Automatic ultrasonic testing of the weld seam of electric welded steel tubes for the detection of longitudinal imperfections
EN10246-9, Non-destructive testing of steel tubes - Part 9: Automatic ultrasonic testing of the weld seam of submerged arc-welded steel tubes for the detection of longitudinal and/or transverse imperfections
EN10246-10, Non-destructive testing of steel tubes - Part 10: Radiographic testing of the weld seam of automatic fusion arc welded steel tubes for the detection of imperfections
EN1056, Non-destructive testing of steel tubes - Qualification and competence of level 1 and 2 non-destructive testing personnel
CR 10261, ECISS information Circular 11 - Iron and steel - Review of available methods of chemical analysis
EN10266:2003, Steel tubes, fittings and steel structural hollow sections - Symbols and definitions of terms for use in product standards
EN ISO 377, Steel and steel products - Location and preparation of seamless and test pieces for mechanical testing (ISO 377: 1997)
EN ISO 643, Steels - Micrographic determination of the apparent grain size ( ISO 643:2003)
EN ISO 2566-1, Steels - Conversion of elongation valves - Part 1: Carbon and low alloy steels ( ISO 2566-1:1984 )
EN ISO 9001:2000, Quality management systems - Requirements ( ISO9001:2000)
EN ISO 14284, Steel and iron - Sampling and preparation of samples for the determination of chemical composition( ISO 14284:1996)
EN ISO 15607, Specification and qualification of welding procedures for metallic materials - General rules ( ISO15607:2003)
EN ISO 15609-1, Specification and qualification of welding procedures for metallic materials - Welding procedure specification - Part 1: Arc welding (ISO 15609-1:2004)
EN ISO 15614-1, Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO 15614-1: 2004)
TORICH INTERNATIONAL LIMITED
Who We are ?
-------A professional steel pipes materials inventor, manufacturer
and solution provider
Torich International Limited is a professional manufacturer
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the factories of Seamless Steel Tubes with Carbon and Alloy Steel
Grade, Welded Precision Steel Tubes,DOM Steel Tubes, Seamless &
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Our factory was established since 1997, with the name of Haiyan
Sanxin Steel Pipe Co., Ltd. The factories’ technicians are of great
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Size range is:
O.D. 4-350mm,
W.T. 0.5-30mm,
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Steel Grade:
Carbon Steel Grade:
ST35.8, ST37.0, ST44, ST52;
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13CrMo44;
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GCr15 52100 suj2 suj3 100Cr6 SKF3S SKF3S 20CrNiMo 8620H 4118H;
Nickel Alloy Grade:
N02200/2201, N04400, N06600, N06601, N06625, N06852, N06219,
N06690, N08800/8810/8811, N08825, N08028, N08535, N08904, N08925,
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253MA, 330, 904L, S31254, XM-19, etc.
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TP410, TP405, TP420, TP430, TP430Ti, TP403, TP409, TP444, TP439,
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Corporate Culture:
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First factory started in 1997, in the name of Torich , now covers
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In 2008, we started the company of Torich International
Limited for international business and marketing.
Welcome partners from all over the world for long term cooperation!