您好,欢迎来到济南新雄经贸有限公司官方网站!

400-0616-756

产品中心

PRODUCT CENTER

产品中心
当前位置: 首页-新闻中心-行业动态-济南镀锌管批量生产要达到什么要求?

济南镀锌管批量生产要达到什么要求?

来源:http://www.jnxxjm.com/

【 发布于:2018-12-27 15:54:49 】


1商标和化学成分镀锌管 镀锌钢管用钢的商标和化学成分应契合 GB 3092 所规则的黑管用钢的商标 和化学成分。
1. The trademark and chemical composition of galvanized steel pipes for galvanized pipes shall conform to the trademark and chemical composition of the steel for black pipes specified in GB 3092.
2制作办法黑管的制作办法(炉焊或电焊)由制作厂选择。镀锌选用热浸镀锌法。
2. Manufacturing method of black pipe (furnace welding or electric welding) is chosen by the manufacturer. Hot dip galvanizing is selected for galvanizing.
3螺纹及管接头
3 threads and fittings
带螺纹交货的镀锌钢管, 螺纹应在镀锌后车制。 螺纹应契合 YB 822 的规则。
For galvanized steel pipes delivered with threads, threads shall be made after galvanizing. Threads shall conform to the rules of YB 822.
钢制管接头应契合 YB 238 的规则; 可锻铸铁管接头应契合 YB 230 的规则。
Steel pipe joints shall conform to the rules of YB 238; malleable cast iron pipe joints shall conform to the rules of YB 230.

20171219787446.jpg

4力学性能 钢管镀锌前的力学性能应契合 GB 3092 的规则。
Mechanical properties of steel pipes before galvanizing should conform to the rules of GB 3092.
5镀锌层的均匀性镀锌钢管应作镀锌层均匀性的实验。钢管试样在硫 酸铜溶液中接连浸渍 5 次不得变红(镀铜色) 。
5. The uniformity of galvanized steel pipes should be tested for the uniformity of galvanized coatings. The steel tube specimen shall not turn red (copper-plated) after being impregnated in copper sulfate solution for five times.
6冷曲折实验公称口径不大于 50mm 的镀锌钢管应作冷曲折实验。弯 曲视点为 90°,曲折半径为外径的 8 倍。实验时不带填充物,试样焊缝处应 置于曲折方向的外侧或上部。实验后,试样上不该有裂缝及锌层剥落同象。
6. The galvanized steel pipe with nominal diameter less than 50 mm should be tested by cold bending test. The bending viewpoint is 90 degrees and the bending radius is 8 times of the outer diameter. There is no filler in the experiment. The weld of the sample should be placed on the outer or upper part of the zigzag direction. After the experiment, there should be no cracks and zinc layer spalling in the sample.
7水压实验水压实验应在黑管进行,也可用涡流探伤代替水压实验。 实验压力或涡流探伤比照试样尺寸应契合 GB 3092 的规则。 钢材力学性能是保证钢材终究使用性能(机械性能)的重要目标,它 取决于钢的化学成分和热处理制度。在钢管标准中,依据不同的使用要求, 规则了拉伸性能(抗拉强度、屈从强度或屈从点、伸长率)以及硬度、韧 性目标,还有用户要求的高、低温性能等。
7. Hydraulic test should be carried out in black tube, and eddy current testing can be used instead of hydraulic test. Test pressure or eddy current testing shall conform to the rule of GB 3092 as compared with sample size. The mechanical property of steel is an important goal to ensure its ultimate service performance (mechanical property), which depends on the chemical composition and heat treatment system of steel. In the steel pipe standard, according to different application requirements, the tensile properties (tensile strength, yield strength or yield point, elongation), hardness and toughness objectives, as well as the high and low temperature properties required by users are regulated.
①抗拉强度(σb) 试样在拉伸过程中,在拉断时所接受的最大力(Fb) ,出以试样原横截 面积(So)所得的应力(σ) ,称为抗拉强度(σb) ,单位为 N/mm2(MPa) 。
(1) Tensile strength (_b) The stress (_) obtained from the original cross-sectional area (So) of the specimen is called tensile strength (_b) in unit of N/mm2 (MPa) when the specimen is subjected to the maximum force (Fb) during tension.
它表明金属材料在拉力作用下抵抗损坏的最大才能。计算公式为: 式中:Fb--试样拉断时所接受的最大力,N(牛顿) So--试样原始横 ; 截面积,mm2。
It shows the greatest ability of metal material to resist damage under tension. The formulas are as follows: Fb - the maximum force to be accepted when the specimen is broken, N (Newton) So - the original cross section of the specimen, cross section area, mm2.
②屈从点(σs) 具有屈从现象的金属材料,试样在拉伸过程中力不增加(坚持稳定) 仍能持续伸长时的应力,称屈从点。若力发生下降时,则应区别上、下屈 服点。屈从点的单位为 N/mm2(MPa) 。
(2) The bending point (_s) is a metal material with the phenomenon of yielding. The stress at which the specimen can continue to elongate without increasing the force (maintaining stability) in the process of tension is called the bending point. If the force decreases, the upper and lower yield points should be distinguished. The unit of yield point is N/mm2 (MPa).
上屈从点(σsu) :试样发生屈从而力首次下降前的最大应力; 下屈从 点(σsl) :当不计初始瞬时效应时,屈从阶段中的最小应力。 屈从点的计算公式为: 式中:Fs--试样拉伸过程中屈从力(稳定) ,N(牛顿)So--试样原始横 截面积,mm2。
Upper yield point (su): the maximum stress before the specimen yields and the force decreases for the first time; Downward yield point (sl): the minimum stress in the yield stage when the initial instantaneous stress is not taken into account. The formulas for calculating the yield point are as follows: Fs - the yield force (stability) in the tensile process of the specimen, N (Newton) So - the original cross-sectional area of the specimen, mm2.
③断后伸长率(σ) 在拉伸实验中,试样拉断后其标距所增加的长度与原标距长度的百分 比,称为伸长率。以 σ 表明,单位为%。计算公式为: 式中: L1--试样拉断后的标距长度, mm; L0--试样原始标距长度, mm。
(3) Post-break elongation (_) In the tensile test, the percentage of the length of the standard distance of the specimen increased after breaking to the length of the original standard distance is called elongation. _indicates that the unit is. The calculation formulas are as follows: L1 - the length of standard distance after specimen breaking, mm; L0 - the original length of standard distance of specimen, mm.
④断面缩短率(ψ) 在拉伸实验中,试样拉断后其缩径处横截面积的最大缩减量与原始横 截面积的百分比,称为断面缩短率。以 ψ 表明,单位为%。计算公式如下: 式中:S0--试样原始横截面积,mm2; S1--试样拉断后缩径处的最少 横截面积,mm2。
(4) Section shortening rate (_) In tensile test, the percentage of the maximum reduction of the cross-sectional area at the shrinkage point to the original cross-sectional area after the specimen is broken is called section shortening rate. _indicates that the unit is. The formulas are as follows: S0 - the original cross-sectional area of the specimen, mm2; S1 - the minimum cross-sectional area at the shrinkage point of the specimen after breaking, mm2.


上一篇:镀锌管行业的管材怎么才能利用好?
下一篇:怎么给济南镀锌管刷漆?