Technical requirements for PE farmland irrigation pipes
外观 来看， PE农田灌溉管材 内外壁应平整；不允许有气泡、裂口、烂洞；明显的划伤、分解变色线及显著的沟纹、凹陷、杂质等；切割端面应平整。 1. In terms of appearance , the inner and outer walls of PE farm irrigation pipes should be flat; air bubbles, cracks, and rotten holes are not allowed; obvious scratches, discoloration and discoloration lines, and significant grooves, depressions, impurities, etc .; the cutting end surface should be flat.
颜色一般为黑色，也可根据供需双方协商确定。 2. The color of PE farm irrigation pipes is generally black, which can also be determined through consultation between the supply and demand sides.
PE农田灌溉管材 尺寸由供需双方商定。 3. The dimensions of PE farmland irrigation pipes shall be agreed upon between the supply and demand sides. The number of decapitations allowed per disc does not exceed two, and the length of each segment must not be less than 15 meters.
PE农田灌溉管材 平均外径偏差 在 2.5 + 左右，各种型号和配套管件适应。 4. The average outside diameter deviation of PE farmland irrigation pipes is about 2.5+, and various models and supporting pipe fittings are suitable.
PE农田灌溉管材 壁厚及偏差 根据尺寸不同各有要求，大体公称外径越大，壁厚和偏差越大 。 5. The wall thickness and deviation of PE farm irrigation pipes have different requirements according to different sizes . The larger the nominal outer diameter, the greater the wall thickness and deviation . 同一截面的壁厚偏差不得超过 25％。 The deviation of the wall thickness of the same section of PE farm irrigation pipes shall not exceed 25%.
颜色和外观 可在 自然光下用肉眼观察。 6. The color and appearance of PE farm irrigation pipes can be observed with the naked eye under natural light. The foreign currency of the pipe should be flat, without air bubbles, cracks, and rotten holes; obvious scratches, discoloration and discoloration lines, and significant frontal grooves, depressions, impurities, etc .; the cutting section should be flat. It is usually black and can also be agreed by both the supply and demand sides.
静液压试验按 GB/T6111—2003规定的试验方法执行，试验条件为20℃、0.3MPa下保压1小时。 7. The hydrostatic test is performed in accordance with the test method specified in GB / T6111-2003. The test conditions are to maintain the pressure for 1 hour at 20 ° C and 0.3MPa.
长度以实测米重及盘管重量计算近似长度，误差要求在 ±5m范围内。 8. The length is calculated based on the measured meter weight and the coil weight, and the error is required within the range of ± 5m.
平均外径及偏差按 GB/T8806测量平均外径和偏差。 9. Average outside diameter and deviation Measure the average outside diameter and deviation according to GB / T8806.
壁厚及偏差按 GB/T8806，沿圆周测量最大壁厚和最小壁厚，精确到0.1mm，计算壁厚偏差率。 10. Wall thickness and deviation According to GB / T8806, the maximum wall thickness and minimum wall thickness are measured along the circumference, accurate to 0.1mm, and the wall thickness deviation rate is calculated. PE农田灌溉管材 同一截面沿圆周均匀测量八点的壁厚，计算算术平均值，为平均壁厚，精确到 0.1mm，平均壁厚与公称壁厚的差为平均壁厚偏差 Measure the wall thickness of eight points along the circumference of the same section of PE irrigation pipe uniformly along the circumference. Calculate the arithmetic average value to be the average wall thickness, accurate to 0.1mm.
拉伸强度按 GB/T8804.3—2003的规定测定。 11. Tensile strength is measured in accordance with GB / T8804.3-2003.
断裂伸长率按 GB/T8804.3—2003的规定测定。 12. The elongation at break is measured according to GB / T8804.3-2003.