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聚乙烯外套管采用高密度聚乙烯材料制成，具有极高的机械强度和优良的耐腐蚀性能，可以保护管材在运输、安装及使用过程中避免因外界因素而造成的破坏。
制造外套管应添加抗氧剂、紫外线稳定剂和碳黑等。
1、上料 2、挤出 3、模具 4、冷却 5、牵引 6、内表面电晕处理 7、切割 8、检验 9、成品
|
项目
|
测试方法
|
指标
|
|
拉伸屈服强度
|
GB/T8004.2
|
≥19MPa
|
|
断裂伸长率
|
GB/T8004.2
|
≥350%
|
|
密度
|
GB/T1033
|
≥940Kg/m
|
|
熔体流动速率
|
GB/T3682
|
0.5g/10min
|
|
纵向回缩率
|
GB/T6671.2
|
≤3%
|
|
长期机械性能
|
GB/T6111
|
>1500h
|
|
热稳定性
|
GB/T7391
|
>20min
|
|
炭黑含量
|
GB/T3021
|
2.5±0.5%
|
|
电晕效果
|
DY试剂
|
≥50DYn/cm
|
|
外径mm
|
标 准 型
|
薄壁型
|
对应钢管外径mm
|
对应保温层厚度mm
|
对应套袖mm
|
|
|
|
|
|
壁厚mm
|
重量Kg
|
允许偏差mm
|
壁厚mm
|
重量Kg
|
允许偏差mm
|
|
|
|
|
|
92
|
2.5
|
0.675
|
±0.23
|
2.0
|
0.543
|
±0.2
|
27 34
|
30 27
|
110
|
|
100
|
2.5
|
0.735
|
±0.23
|
2.0
|
0.591
|
±0.2
|
34
|
31
|
110
|
|
110
|
2.5
|
0.811
|
±0.23
|
2.0
|
0.651
|
±0.2
|
48
|
29
|
121
|
|
121
|
2.5
|
0.893
|
±0.23
|
2.0
|
0.718
|
±0.2
|
57
|
30
|
125
|
|
125
|
2.5
|
0.924
|
±0.23
|
2.0
|
0.742
|
±0.2
|
57 60
|
31 30
|
133
|
|
133
|
2.5
|
0.984
|
±0.23
|
2.0
|
0.790
|
±0.2
|
57 60
|
36 34
|
142
|
|
142
|
3
|
1.258
|
±0.25
|
2.0
|
0.844
|
±0.2
|
76
|
31
|
155
|
|
150
|
3
|
1.330
|
±0.25
|
2.0
|
0.893
|
±0.2
|
76
|
35
|
165
|
|
155
|
3
|
1.375
|
±0.25
|
2.0
|
0.923
|
±0.2
|
89
|
31
|
165
|
|
161
|
3
|
1.430
|
±0.25
|
2.0
|
0.959
|
±0.2
|
89
|
34
|
175
|
|
165
|
3
|
1.466
|
±0.25
|
2.0
|
0.983
|
±0.2
|
89
|
36
|
175
|
|
171
|
3
|
1.520
|
±0.25
|
2.0
|
1.019
|
±0.2
|
89
|
39
|
180
|
|
175
|
3
|
1.556
|
±0.25
|
2.0
|
1.044
|
±0.2
|
108
|
31
|
180
|
|
180
|
3
|
1.601
|
±0.25
|
2.0
|
1.074
|
±0.2
|
108 114
|
33 31
|
188
|
|
188
|
3
|
1.674
|
±0.25
|
2.0
|
1.122
|
±0.2
|
114
|
35
|
200
|
|
194
|
3
|
1.728
|
±0.25
|
2.0
|
1.158
|
±0.2
|
108
|
41
|
200
|
|
200
|
3.2
|
1.899
|
±0.26
|
2.2
|
1.312
|
±0.21
|
133
|
31
|
211
|
|
208
|
3.2
|
1.977
|
±0.26
|
2.2
|
1.365
|
±0.21
|
133
|
35
|
219
|
|
211
|
3.2
|
2.005
|
±0.26
|
2.2
|
1.385
|
±0.21
|
133
|
31
|
219
|
|
219
|
3.2
|
2.083
|
±0.26
|
2.2
|
1.438
|
±0.21
|
133
|
40.8
|
225
|
|
225
|
3.5
|
2.338
|
±0.28
|
2.5
|
1.678
|
±0.23
|
140 159
|
40 30
|
238
|
|
230
|
3.5
|
2.391
|
±0.28
|
2.5
|
1.715
|
±0.23
|
165
|
30
|
238
|
|
238
|
3.5
|
2.475
|
±0.28
|
2.5
|
1.776
|
±0.23
|
159
|
37
|
245
|
|
245
|
3.5
|
2.549
|
±0.28
|
2.5
|
1.828
|
±0.23
|
159
|
39
|
265
|
|
250
|
3.9
|
2.894
|
±0.30
|
2.5
|
1.866
|
±0.23
|
159
|
43
|
265
|
|
265
|
3.9
|
3.071
|
±0.30
|
2.5
|
1.979
|
±0.23
|
165
|
47
|
285
|
|
280
|
4.4
|
3.657
|
±0.32
|
3.0
|
2.506
|
±0.25
|
165
|
53
|
290
|
|
285
|
4.4
|
3.724
|
±0.32
|
3.0
|
2.551
|
±0.25
|
219
|
30
|
290
|
|
290
|
4.4
|
3.790
|
±0.32
|
3.0
|
2.597
|
±0.25
|
219
|
32
|
302
|
|
300
|
4.4
|
3.923
|
±0.32
|
3.0
|
2.687
|
±0.25
|
219
|
37
|
310
|
|
305
|
4.4
|
3.989
|
±0.32
|
3.0
|
2.732
|
±0.25
|
219
|
40
|
310
|
|
310
|
4.4
|
4.055
|
±0.32
|
3.0
|
2.778
|
±0.25
|
219
|
42
|
327
|
|
315
|
4.9
|
4.583
|
±0.35
|
3.5
|
3.288
|
±0.27
|
219
|
44
|
327
|
|
325
|
4.9
|
4.730
|
±0.35
|
3.5
|
3.394
|
±0.27
|
219
|
49.5
|
335
|
|
327
|
4.9
|
4.760
|
±0.35
|
3.5
|
3.415
|
±0.27
|
219
|
50
|
345
|
|
335
|
4.9
|
4.878
|
±0.35
|
3.5
|
3.499
|
±0.27
|
219
|
54
|
345
|
|
345
|
4.9
|
5.026
|
±0.35
|
3.5
|
3.605
|
±0.27
|
273
|
32
|
365
|
|
355
|
4.9
|
5.174
|
±0.35
|
3.5
|
3.710
|
±0.27
|
273
|
37
|
365
|
|
361
|
5.6
|
6.002
|
±0.38
|
4.0
|
4.307
|
±0.3
|
273
|
40
|
385
|
|
365
|
5.6
|
6.070
|
±0.38
|
4.0
|
4.355
|
±0.3
|
273
|
42
|
385
|
|
381
|
5.6
|
6.340
|
±0.38
|
4.0
|
4.548
|
±0.3
|
273
|
40
|
440
|
|
385
|
5.6
|
6.408
|
±0.38
|
4.0
|
1.596
|
±0.3
|
273
|
52
|
440
|
|
400
|
6.3
|
7.480
|
±0.57
|
5.0
|
5.956
|
±0.47
|
325
|
32
|
417
|
|
407
|
6.3
|
7.613
|
±0.57
|
5.0
|
6.062
|
±0.47
|
325
|
35
|
420
|
|
417
|
6.3
|
7.803
|
±0.57
|
5.0
|
6.213
|
±0.47
|
325
|
41
|
439
|
|
420
|
7.0
|
8.719
|
±0.63
|
5.0
|
6.258
|
±0.47
|
325
|
42
|
439
|
|
433
|
7.0
|
8.994
|
±0.63
|
5.0
|
6.454
|
±0.47
|
325
|
49
|
450
|
|
439
|
7.0
|
9.120
|
±0.63
|
5.0
|
6.544
|
±0.47
|
325
|
52
|
450
|
|
450
|
7.0
|
9.352
|
±0.63
|
5.0
|
6.710
|
±0.47
|
377
|
31
|
464
|
|
464
|
7.0
|
9.648
|
±0.63
|
5.0
|
6.922
|
±0.47
|
377
|
31
|
470
|
|
470
|
7.0
|
9.775
|
±0.63
|
5.0
|
7.012
|
±0.47
|
377
|
41
|
500
|
|
475
|
7.0
|
9.880
|
±0.63
|
5.0
|
7.087
|
±0.47
|
377
|
44
|
500
|
|
485
|
7.0
|
10.091
|
±0.63
|
5.0
|
7.238
|
±0.47
|
377
|
40
|
500
|
|
490
|
7.0
|
10.197
|
±0.63
|
5.0
|
7.314
|
±0.47
|
377
|
51
|
500
|
|
500
|
7.8
|
11.579
|
±0.69
|
6.0
|
7.939
|
±0.55
|
377
|
55
|
520
|
|
520
|
7.8
|
12.049
|
±0.69
|
6.0
|
9.301
|
±0.55
|
426
|
41
|
525
|
|
525
|
7.8
|
12.166
|
±0.69
|
6.0
|
9.392
|
±0.55
|
426
|
43
|
535
|
|
530
|
7.8
|
12.284
|
±0.69
|
6.0
|
9.482
|
±0.55
|
426
|
46
|
550
|
|
535
|
7.8
|
12.402
|
±0.69
|
6.0
|
9.572
|
±0.55
|
426
|
48
|
550
|
|
550
|
8.8
|
14.363
|
±0.76
|
6.5
|
10.655
|
±0.58
|
426
|
55
|
568
|
|
568
|
8.8
|
14.841
|
±0.76
|
6.5
|
11.077
|
±0.58
|
478
|
40
|
600
|
|
580
|
8.8
|
15.195
|
±0.76
|
6.5
|
11.243
|
±0.58
|
478
|
44
|
600
|
|
590
|
8.8
|
15.425
|
±0.76
|
6.5
|
11.439
|
±0.58
|
478
|
50
|
630
|
|
600
|
8.8
|
15.690
|
±0.76
|
6.5
|
11.635
|
±0.58
|
478
|
54
|
655
|
|
622
|
8.8
|
16.274
|
±0.76
|
6.5
|
12.066
|
±0.58
|
478
|
65.5
|
655
|
|
630
|
9.8
|
18.331
|
±0.84
|
8.0
|
15.077
|
±0.70
|
529
|
42
|
655
|
|
641
|
9.8
|
18.656
|
±0.84
|
8.0
|
15.273
|
±0.70
|
529
|
48
|
655
|
|
655
|
9.8
|
19.069
|
±0.84
|
8.0
|
15.610
|
±0.70
|
529
|
55
|
685
|
|
685
|
9.8
|
19.965
|
±0.84
|
8.0
|
16.334
|
±0.70
|
529
|
70
|
710
|
|
700
|
9.8
|
20.695
|
±0.84
|
8.0
|
16.937
|
±0.70
|
529
|
80
|
733
|
|
733
|
11.1
|
24.167
|
±0.93
|
8.0
|
17.492
|
±0.70
|
630
|
43
|
760
|
|
740
|
11.1
|
24.401
|
±0.93
|
8.0
|
17.661
|
±0.70
|
630
|
47
|
760
|
|
746
|
11.1
|
24.602
|
±0.93
|
8.0
|
17.806
|
±0.70
|
630
|
50
|
760
|
|
750
|
11.1
|
24.736
|
±0.93
|
8.0
|
17.903
|
±0.70
|
630
|
52
|
777
|
|
760
|
11.1
|
25.071
|
±0.93
|
8.0
|
18.144
|
±0.70
|
630
|
57
|
777
|
|
777
|
11.1
|
25.640
|
±0.93
|
8.0
|
18.554
|
±0.70
|
630
|
65.5
|
795
|
|
795
|
11.1
|
26.212
|
±0.93
|
8.0
|
18.988
|
±0.70
|
630
|
74
|
830
|
|
830
|
11.1
|
27.414
|
±0.93
|
8.0
|
19.833
|
±0.70
|
720
|
47
|
850
|
|
850
|
12
|
30.328
|
±1.0
|
9.0
|
22.828
|
±0.77
|
720
|
56
|
885
|
|
885
|
12
|
31.595
|
±1.0
|
9.0
|
23.77
|
±0.77
|
720
|
73
|
-
|
|
911
|
12
|
33.730
|
±1.0
|
9.0
|
25.379
|
±0.77
|
820
|
53
|
988
|
|
988
|
12
|
35.232
|
±1.0
|
9.0
|
26.573
|
±0.77
|
820
|
75
|
1054
|
|
1044
|
14
|
43.490
|
±1.15
|
10
|
31.185
|
±0.85
|
920
|
48
|
-
|
|
1054
|
14
|
43.912
|
±1.15
|
10
|
31.486
|
±0.85
|
920
|
57
|
1095
|
|
1095
|
14
|
45.643
|
±1.15
|
10
|
32.732
|
±0.85
|
920
|
77
|
-
|
|
1155
|
14
|
48.477
|
±1.15
|
10
|
34.532
|
±0.85
|
1020
|
57
|
1210
|
|
1192
|
14
|
49.739
|
±1.15
|
10
|
35.648
|
±0.85
|
1020
|
72
|
-
|
|
1210
|
14
|
50.499
|
±1.15
|
10
|
36.191
|
±0.85
|
1020
|
95
|
-
|
|
1380
|
14
|
57.677
|
±1.15
|
10
|
41.318
|
±0.85
|
1220
|
70
|
1430
|
