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PE管材的不圓度范圍國標參考標準 管材的不圓度按 GB/T 8806 規(guī)定測量同一斷面的最大外徑和最小外徑， 最大外徑減去最小外徑為不圓度。管材的不園度在擠出時測量。 對公稱直徑小于等于 630mm 的直管的不圓度的推薦要求見表 B1。盤管及公稱外徑大于 630mm 管材的不園度可由供需雙方商定。
The out of roundness range of PE pipes is in accordance with GB / T 8806. The maximum and minimum outer diameters of the same section shall be measured according to GB / T 8806. The out of roundness shall be the maximum outer diameter minus the minimum outer diameter. The out of roundness of pipe is measured during extrusion. The recommended requirements for out of roundness of straight pipes with nominal diameter less than or equal to 630mm are shown in table B1. The out of roundness of coil and pipe with nominal outer diameter greater than 630mm can be determined by both parties.
|
表 A1 管材不圓度 公稱外徑 |
mm |
最大不圓度 |
|
16 |
|
1.2 |
|
20 |
|
1.2 |
|
25 |
|
1.2 |
|
32 |
|
1.3 |
|
40 |
|
1.4 |
|
50 |
|
1.4 |
|
63 |
|
1.5 |
|
75 |
|
1.6 |
|
90 |
|
1.8 |
|
110 |
|
2.2 |
|
125 |
|
2.5 |
|
140 |
|
2.8 |
|
160 |
|
3.2 |
|
180 |
|
3.6 |
|
200 |
|
4.0 |
|
225 |
|
4.5 |
|
250 |
|
5.0 |
|
280 |
|
9.8 |
