Specifications: diameter: 320 to 127 mm thickness: 0.4 to 12.7 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe

Fertilizer seamless high-pressure steel pipe


 

Fertilizer equipment with high-pressure seamless steel pipe (GB6479-1986)

(1) Dimensions
Fertilizer equipment with high-pressure seamless steel pipe sizes

Fertilizer seamless high-pressure steel pipe

Outside diameter / mm × wall thickness / mm Theoretical mass / (kg / m) Outside diameter / mm × wall thickness / mm Theoretical mass / (kg / m)
14 × 4 0.986 19 × 5 1.73
15 × 4 1.09 24 × 4.5 2.16
15 × 4.5 1.17 24 × 6 2.66
25 × 5 2.47 102 × 21 41.95
25 × 6 2.81 108 × 14 32.45
25 × 7 3.11 127 × 14 39.01
35 × 6 4.29 127 × 17 46.12
35 × 9 5.77    
43 × 7 6.21 127 × 21 54.89
43 × 10 8.14 133 × 17 48.63
49 × 8 8.09 154 × 23 74.30
49 × 10 9.62 159 × 18 62.59
57 × 9 10.65 159 × 19 65.60
68 × 9 13.09 159 × 20 68.55
68 × 10 14.30 159 × 28 90.45
68 × 13 17.63 168 × 28 96.67
70 × 10 14.80 180 × 19 75.43
83 × 9 16.42 180 × 22 85.72
83 × 10 18.00 180 × 30 110.97
83 × 11 19.53 219 × 35 158.81
83 × 15 25.15 273x18 113.19
102 × 11 24.68 273 × 20 124.78
102 × 14 30.38 273 × 34 200.39
102x17 35.64 273 × 40 229.83

 

Note: the usual length of steel pipe for the 4-12m.
(2) allow deviation
Fertilizers, equipment, high pressure seamless steel grade and chemical composition

high-pressure steel pipe

License No. Chemical composition (wt%) (%)
C Si Mn S P Cr Mo
10 0.07 to 0.14 0.17 to 0.37 0.35 ~ 0.65 0.040 0.035    
20G 0.17 to 0.24 0.17 to 0.37 0.35 ~ 0.65 0.035 0.035    
16Mn 0.12 to 0.20 0.20 ~ 0.60 1.20 to 1.60 0.040 0.040    
15MnV 0.12 to 0.18 0.20 ~ 0.60 1.20 to 1.60 0.040 0.040 V.0.04 ~ 0.12  
10MoWVNb 0.07 to 0.13 0.50 ~ 0.80 0.50 ~ 0.80 0.030 0.040 V.0.30 ~ 0.50 0.60 to 0.90
12CrMo 0.08 ~ 0.15 0.17 to 0.37 0.40 ~ 0.70 0.040 0.035 0.40 ~ 0.70 0.40 ~ 0.55
15CrMo 0.12 to 0.18 0.17 to 0.37 0.40 ~ 0.70 0.040 0.035 0.80 ~ 1.10 0.40 ~ 0.55
1Cr5Mo ≤ 0.15 ≤ 0.50 ≤ 0.60 0.030 0.035 4.00 to 6.00 0.40 ~ 0.60
12Cr2Mo 0.08 ~ 0.15 0.40 ~ 0.70 ≤ 0.50 0.035 0.035 2.00 ~ 2.50 0.90 to 1.20

 

Note: 10MoWVNb steel W content of 0.50% to 0.90%, and the Nb content was 0.06% and 0.12%. Table, all steel residual Cu content ≤ 0.25%, to allow N content ≤ 0.008%. 20G low temperature steel, according to user requirements, the carbon content of 0.17% to 0.22%. The above content are the mass fraction.
(3) Mechanical Properties
The mechanical properties of the chemical fertilizer equipment with high-pressure seamless steel pipe

 

License No. Mechanical Properties
Tensile strength ób / MPa Yield point ós / MPa Elongation δ5 (%) Impact toughness / ak / (J/cm2)
10 335 to 490 205 24  
20G 410 to 550 245 24 49
16Mn 490 to 670 320 21 59
15MnV 510 to 690 350 19 59
10M0WVNb 470 to 670 295 19 78
12CrMo 410 to 560 205 21 69
15CrMo 440 to 640 235 21 59
1Cr5Mo 390 to 590 195 22 118
12Cr2Mo 450 ~ 600 280 20 48 (DVM kind)

 

Note:
1. Allow a sample of the shock value than the table values ​​specified low 10J/cm2, but the arithmetic mean of the three samples is not less than the specified value in the table.
2. 12Cr2Mo steel pipe, when the outer diameter is not greater than 30mm, the wall thickness of not greater than 3mm, its yield point allows to reduce 10MPa. Other grades when the wall thickness is greater than 16 ~ 40mm, yield point allows you to reduce 10MPa.
(4) use
Applicable to operating temperature -40-400 ℃, working pressure of 10-32MPa chemical equipment and pipes, mainly used for transporting ammonia, urea, methanol
And other chemical media.

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