GB/T 14291 Q235 Q345 Welded Steel Tubes
GB/T 14291 standard specifies the ore powder slurry transportation with electric welded steel pipe grade expression, order content, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certification. Technical requirements, test methods, inspection rules, packaging, marking and quality certification. This standard applies to mineral powder, slurry transportation and river, port terminal dredging pipeline with electric welded steel pipe (hereinafter referred to as steel pipe)
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Carbon steel tube Description
GB/T 14291 Q235 Q345Welded pipe is also called welded steel pipe. It is a steel pipe welded from steel plates or strips. Its length is usually 6 meters. The production process of welded steel pipes is simple, the production efficiency is high, there are many varieties and specifications, and the equipment investment is low, but the general strength is lower than that of seamless steel pipes.
GB/T 14291 Large Welded Pipe Specification
|
Item |
Large Welded Pipe |
|
ERW Welded Steel Pipe |
Size:OD:21.3---2220mm (1/2"-80") WT:0.5 -- 60mm (SCH 10-SCH XXS) Length:5.8m,6m,8m,11.8m,12m, etc. |
|
Steel material:Q235, 20, Q345A53B, A106B, API 5L B,X42,X46, X52,X60, X65ST37.0,ST35.8,St37.2,St35.4/8,St42,St45,St52,St52.4 STP G38,STP G42,STPT42,STB42,STS42,STPT49,STS49 |
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Standard:ASTM A53, A106, API 5L, ASME B36.10M-1996 DIN1626, DIN1629, DIN17175, DIN 2448 JIS G3452,JIS G3454,JIS G3455,JIS G3456,JIS G3457,JIS G3461 |
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|
EFW Welded Steel Pipe |
Size:OD:21.3---2220mm (1/2"-80") WT:0.5 -- 60mm (SCH 10-SCH XXS) Length:5.8m,6m,8m,11.8m,12m, etc. |
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Steel material:10,20,45,A53A,A53B,A106Gr.A,A106Gr.B,A106A, A106B,ST52,ST358,16Mn,Q235, Q195, Q345, Q215, API 5L Gr.B,Gr.65, Gr.60,Gr.70,X42,X52,X60,X65,X70,X80,etc |
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Standard:BS EN 10296, BS EN 10025,BS EN 10297,BS6323, GB/T 13793-1992,GB/T 14291-2006, GB/T 3091-1993,API5L,SY/T5037, CJ/T3022,ASTM A252 |
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Spiral Welded STEEL Pipe |
Size:OD:21.3---2220mm (1/2"-80") WT:0.5 -- 60mm (SCH 10-SCH XXS) Length:5.8m,6m,8m,11.8m,12m, etc. |
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Steel material: API Gr.B ASTM GR.A, GR.B, X42, X46, X52, etc. |
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Standard:API 5L, ASTM A252/A134, EN10217, EN10219 GB/T9711.1-1997 SY/T5037-200 SY/T5040-92 |
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|
Surface |
Galvanized or black painting.etc |
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Shape |
Round/Square/Rectangle |
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Packing |
1. Bundle packing. 2. Bevel end or plain end or as per buyer's requirements. 3. Marking: as per customer's requests. 4. Painting varnish coating on the pipe. 5. Plastic caps at ends. |
|
Payment Term |
T/T, Irrevocable L/C at sight |
|
Trade Term |
Ex-work, FCA, FOB, CFR , CIF, etc |
GB/T 14291 Q235 Q345 Steel Pipe Outer Diameter, Wall Thickness, Theoretical Weight and Test Pressure
| Nominal Outer Diameter(D)/mm | Nominal Wall Thickness(S)/mm | Theoretical Weight/(kg/m) | Test Pressure/MPa | ||
| Q235A,Q235B | Q295A,Q295B | Q345A,Q345B | |||
| 21.3 | 2.5 | 1.16 | 15 | 15 | 15 |
| 21.3 | 3 | 1.35 | 15 | 15 | 15 |
| 21.3 | 3.5 | 1.54 | 15 | 15 | 15 |
| 25 | 2.5 | 1.39 | 15 | 15 | 15 |
| 25 | 3 | 1.63 | 15 | 15 | 15 |
| 25 | 3.5 | 1.86 | 15 | 15 | 15 |
| 25 | 4 | 2.07 | 15 | 15 | 15 |
| 26.9 | 2.5 | 1.50 | 15 | 15 | 15 |
| 26.9 | 3 | 1.77 | 15 | 15 | 15 |
| 26.9 | 3.5 | 2.02 | 15 | 15 | 15 |
| 26.9 | 4 | 2.26 | 15 | 15 | 15 |
| 31.8 | 2.5 | 1.81 | 15 | 15 | 15 |
| 31.8 | 3 | 2.13 | 15 | 15 | 15 |
| 31.8 | 3.5 | 2.44 | 15 | 15 | 15 |
| 31.8 | 4 | 2.74 | 15 | 15 | 15 |
| 33.7 | 2.5 | 1.92 | 15 | 15 | 15 |
| 33.7 | 3 | 2.27 | 15 | 15 | 15 |
| 33.7 | 3.5 | 2.61 | 15 | 15 | 15 |
| 33.7 | 4 | 2.93 | 15 | 15 | 15 |
| 38 | 2.5 | 2.19 | 15 | 15 | 15 |
| 38 | 3 | 2.59 | 15 | 15 | 15 |
| 38 | 3.5 | 2.98 | 15 | 15 | 15 |
| 38 | 4 | 3.35 | 15 | 15 | 15 |
| 40 | 2.5 | 2.31 | 15 | 15 | 15 |
| 40 | 3 | 2.74 | 15 | 15 | 15 |
| 40 | 3.5 | 3.15 | 15 | 15 | 15 |
| 40 | 4 | 3.55 | 15 | 15 | 15 |
| 42.4 | 2.5 | 2.46 | 15 | 15 | 15 |
| 42.4 | 3 | 2.91 | 15 | 15 | 15 |
| 42.4 | 3.5 | 3.36 | 15 | 15 | 15 |
| 42.4 | 4 | 3.79 | 15 | 15 | 15 |
| 48.3 | 2.5 | 2.82 | 14.6 | 15 | 15 |
| 48.3 | 3 | 3.35 | 15 | 15 | 15 |
| 48.3 | 3.5 | 3.87 | 15 | 15 | 15 |
| 48.3 | 4 | 4.37 | 15 | 15 | 15 |
| 51 | 2.5 | 2.99 | 13.8 | 15 | 15 |
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