Spiral steel pipe main quality indicators

normalTable边界= 1单元格间距= 0单元格边距宽度= 0 = 595>正常对齐=中心>项目正常对齐=中心>保送钢管正常对齐=> GB / T9711 -中心 1997正常对齐=> SY / T5037 -中心 - 2000正常对齐=> SY / T5038 -中心 92 normal align = center> pipe diameter to normal align = center> D< 508±0. 75% dnormal对齐=中心> D≥508±1。 00% dnormal对齐=> D<中心; 508±0. 75% dnormal对齐=中心> D≥508±0。 dnormal对齐=中心> 50%±1。 25% Dnormal align = center> wall thickness to normal align = center> D< 508 + 15. tnormal对齐=>中心- 0% 12. 5% tnormal对齐> D≥508 + 17 =中心。 tnormal对齐=>中心- 5% 10. 05年tnormal => D <中心对齐 508±12. 5% tnormal对齐=中心> D≥508±10。 0％tnormal align=center>±12. More than 5% tnormal align = center> weld high normal align = center> 3 or less. 18mmnormal align=center>0. 5 - 3. 0mmnormal align=center>内≤2. 0mmnormal align=center>外≤2. 5mmnormal align=center>直度normal align=center>≤0. 2% lnormal对齐=中心>≤0。 2% lnormal对齐=中心>≤0。 25% Lnormal align = center> pipe end state normal align = center> slope Angle 30 & ordm; - - 35º Normal align = center> blunt edge 1. 59±0. 79 mmnormal align = center> oblique cutting 1 or less. 59 mmnormal align = center> slope Angle 30 & ordm; — 35º Normal align = center> blunt edge 1. 6±0. 8 mmnormal => D <中心对齐 813 slice helical 1 or less. 5 mmnormal align = center> D p 813 oblique cutting 3 or less. 0 mmnormal align = center> slope Angle 30 & ordm; — 35º Normal align = center> 0 - blunt side - 3 mmnormal align = center> oblique cutting 1 or less. 5 mmnormal align = center> NDT normal align = center> from the pipe weld using X-ray inspection within 203 mm; Is 203 mm from the pipe outside of weld ultrasonic testing; Butt weld, repair welding seam and circular weld ultrasonic testing normal align = center> butt weld, repair welding and ring to weld using X ray and ultrasonic inspection; Every 10 root steel pipe smoking two steel pipe end of the spiral weld x-rays or ultrasonic inspection normal align = center> butt weld, repair welding and circular weld ultrasonic testing normal align = center> water pressure experiment normal align = center> P = 2 [ σ] t/Dnormal align=center>P =2[ σ] t/Dnormal align=center>P =2[ σ] T/Dnormal align = center> note normal align = center> D: steel pipe nominal diameter, mm; T: nominal pipe wall thickness, mm; ( σ] : hydrostatic pressure test of experimental stress MPa; L: single pipe length, mm; P: hydrostatic test pressure, Mpa