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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

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%) (%)
License No.	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)
	Tensile strength ób / MPa	≥
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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