标准 Standard:
GB/T8163 China National Standard
ASTM A 53M Standard of American society for Testing＆Materials
ASTM A 106 Standard of American society for Testing＆Materials

用途 Used:
用于石油、天然气输送以及其他流体输送
For conveyance of petroleum , gas and conveyance of other fluid

尺寸公差 Tolerances on Dimensions：

标准 Standard	外径公差 Outside Diameter Tolerance		壁厚公差 Wall Thickness Tolerance
GB/T8163	D＜50mm	±0.50mm	15%/-12.5%(最小min0.45mm/-0.4mm)
	D≥50mm	±1％
ASTM A 53M	D≤48.3mm	±0.4mm	±12.5%
	D＞48.3mm	±1％
ASTM A 106	D≤48.3mm	±0.4mm	15%/-10%
	48.3mm＜D≤114.3mm	±0.79mm
	D＞114.3mm	1.59mm/-0.79mm