Pression nominale des tubes ASTM A269
La pression nominale pourTube en acier inoxydable ASTM A269La pression nominale dépend de divers facteurs tels que le matériau, les dimensions et la température. La norme ASTM A269 est une spécification standard pour les tubes en acier inoxydable austénitique sans soudure et soudés destinés à un usage général. La pression nominale est généralement déterminée en fonction des critères de conception, des propriétés du matériau et des normes de fabrication.
Les facteurs clés influençant la pression nominale comprennent :
1. Qualité du matériau: La norme ASTM A269 couvre différentes qualités d'aciers inoxydables austénitiques, tels queASTM A269 TP304, 304L, 316 et 316LLes différentes qualités ont des valeurs de pression nominale différentes en raison des variations de leurs propriétés mécaniques.
2. Taille: LeTubes ASTM A269Le diamètre extérieur, l'épaisseur de la paroi et la longueur d'un tuyau jouent un rôle crucial dans la détermination de sa pression nominale. Des parois plus épaisses et des diamètres plus petits entraînent généralement des pressions nominales plus élevées.
3. Température:Les températures élevées peuvent affecter les propriétés matérielles de l'acier inoxydable. Les valeurs nominales de pression peuvent diminuer à des températures plus élevées et cette information est généralement prise en compte dans les calculs de conception.
Pression nominale des tubes ASTM A269
| OD pouces | Moyenne des murs en pouces | Limite d'élasticité minimale (PSI) | Résistance minimale à la traction (PSI) | Pression d'éclatement théorique (PSI) | Pression de service (PSI) 25 % de l'éclatement | Limite d'élasticité théorique (PSI) | Pression d'effondrement (PSI) |
| 0.25 | 0.02 | 30,000 | 75,000 | 14,286 | 3,571 | 5,714 | 4,416 |
| 0.25 | 0.028 | 30,000 | 75,000 | 21,649 | 5,412 | 8,660 | 5,967 |
| 0.25 | 0.035 | 30,000 | 75,000 | 29,167 | 7,292 | 11,667 | 7,224 |
| 0.25 | 0.049 | 30,000 | 75,000 | 48,355 | 12,089 | 19,342 | 9,455 |
| 0.25 | 0.065 | 30,000 | 75,000 | 81,250 | 20,313 | 32,500 | 11,544 |
| 0.375 | 0.02 | 30,000 | 75,000 | 8,955 | 2,239 | 3,582 | 3,029 |
| 0.375 | 0.028 | 30,000 | 75,000 | 13,166 | 3,292 | 5,266 | 4,145 |
| 0.375 | 0.035 | 30,000 | 75,000 | 17,213 | 4,303 | 6,885 | 5,077 |
| 0.375 | 0.049 | 30,000 | 75,000 | 26,534 | 6,634 | 10,614 | 6,816 |
| 0.375 | 0.065 | 30,000 | 75,000 | 39,796 | 9,949 | 15,918 | 8,597 |
| 0.5 | 0.02 | 30,000 | 75,000 | 6,522 | 1,630 | 2,609 | 2,316L |
| 0.5 | 0.028 | 30,000 | 75,000 | 9,459 | 2,365 | 3,784 | 3,172 |
| 0.5 | 0.035 | 30,000 | 75,000 | 12,209 | 3,052 | 4,884 | 3,906 |
| 0.5 | 0.049 | 30,000 | 75,000 | 18,284 | 4,571 | 7,313 | 5,316L |
| 0.5 | 0.065 | 30,000 | 75,000 | 26,351 | 6,588 | 10,541 | 6,786 |
| 0.5 | 0.083 | 30,000 | 75,000 | 37,275 | 9,319 | 14,910 | 8,307 |
| 0.625 | 0.02 | 30,000 | 75,000 | 5,128 | 1,282 | 2,051 | 1,859 |
| 0.625 | 0.028 | 30,000 | 75,000 | 7,381 | 1,845 | 2,953 | 2,568 |
| 0.625 | 0.035 | 30,000 | 75,000 | 9,459 | 2,365 | 3,784 | 3,172 |
| 0.625 | 0.049 | 30,000 | 75,000 | 13,947 | 3,487 | 5,579 | 4,335 |
| 0.625 | 0.065 | 30,000 | 75,000 | 19,697 | 4,924 | 7,879 | 5,591 |
| 0.625 | 0.083 | 30,000 | 75,000 | 27,124 | 6,781 | 10,850 | 6,910 |
| 0.625 | 0.095 | 30,000 | 75,000 | 32,759 | 8,190 | 13,103 | 7,734 |
| 0.625 | 0.109 | 30,000 | 75,000 | 40,172 | 10,043 | 16,069 | 8,639 |
| 0.75 | 0.028 | 30,000 | 75,000 | 6,052 | 1,513 | 2,421 | 2,156 |
| 0.75 | 0.035 | 30,000 | 75,000 | 7,721 | 1,930 | 3,088 | 2,669 |
| 0.75 | 0.049 | 30,000 | 75,000 | 11,273 | 2,818 | 4,509 | 3,664 |
| 0.75 | 0.065 | 30,000 | 75,000 | 15,726 | 3,931 | 6,290 | 4,749 |
| 0.75 | 0.083 | 30,000 | 75,000 | 21,318 | 5,330 | 8,527 | 5,905 |
| 0.75 | 0.095 | 30,000 | 75,000 | 25,446 | 6,362 | 10,179 | 6,637 |
| 0.75 | 0.109 | 30,000 | 75,000 | 30,733 | 7,683 | 12,293 | 7,453 |
| 0.75 | 0.12 | 30,000 | 75,000 | 35,294 | 8,824 | 14,118 | 8,064 |
| 0.875 | 0.02 | 30,000 | 75,000 | 3,593 | 898 | 1,437 | 1,340 |
| 0.875 | 0.028 | 30,000 | 75,000 | 5,128 | 1,282 | 2,051 | 1,859 |
| 0.875 | 0.035 | 30,000 | 75,000 | 6,522 | 1,630 | 2,609 | 2,316L |
| 0.875 | 0.049 | 30,000 | 75,000 | 9,459 | 2,365 | 3,784 | 3,172 |
| 0.875 | 0.065 | 30,000 | 75,000 | 13,087 | 3,272 | 5,235 | 4,126 |
| 0.875 | 0.083 | 30,000 | 75,000 | 17,560 | 4,390 | 7,024 | 5,152 |
| 0.875 | 0.095 | 30,000 | 75,000 | 20,803 | 5,201 | 8,321 | 5,807 |
| 0.875 | 0.109 | 30,000 | 75,000 | 24,886 | 6,221 | 9,954 | 6,543 |
| 0.875 | 0.12 | 30,000 | 75,000 | 28,346 | 7,087 | 11,339 | 7,100 |
| 1 | 0.028 | 30,000 | 75,000 | 4,449 | 1,112 | 1,780 | 1,633 |
| 1 | 0.035 | 30,000 | 75,000 | 5,645 | 1,411 | 2,258 | 2,027 |
| 1 | 0.049 | 30,000 | 75,000 | 8,149 | 2,037 | 3,259 | 2,796 |
| 1 | 0.065 | 30,000 | 75,000 | 11,207 | 2,802 | 4,483 | 3,647 |
| 1 | 0.083 | 30,000 | 75,000 | 14,928 | 3,732 | 5,971 | 4,567 |
| 1 | 0.095 | 30,000 | 75,000 | 17,593 | 4,398 | 7,037 | 5,159 |
| 1 | 0.109 | 30,000 | 75,000 | 20,908 | 5,227 | 8,363 | 5,827 |
| 1 | 0.12 | 30,000 | 75,000 | 23,684 | 5,921 | 9,474 | 6,336 |
| 1 | 0.134 | 30,000 | 75,000 | 27,459 | 6,865 | 10,984 | 6,963 |
| 1.25 | 0.035 | 30,000 | 75,000 | 4,449 | 1,112 | 1,780 | 1,633 |
| 1.25 | 0.049 | 30,000 | 75,000 | 6,380 | 1,595 | 2,552 | 2,260 |
| 1.25 | 0.065 | 30,000 | 75,000 | 8,705 | 2,176 | 3,482 | 2,958 |
| 1.25 | 0.083 | 30,000 | 75,000 | 11,485 | 2,871 | 4,594 | 3,719 |
| 1.25 | 0.095 | 30,000 | 75,000 | 13,443 | 3,361 | 5,377 | 4,213 |
| 1.25 | 0.109 | 30,000 | 75,000 | 15,843 | 3,961 | 6,337 | 4,776 |
| 1.25 | 0.12 | 30,000 | 75,000 | 17,822 | 4,455 | 7,129 | 5,207 |
| 1.25 | 0.134 | 30,000 | 75,000 | 20,468 | 5,117 | 8,187 | 5,742 |
| 1.5 | 0.035 | 30,000 | 75,000 | 3,671 | 918 | 1,469 | 1,367 |
| 1.5 | 0.049 | 30,000 | 75,000 | 5,243 | 1,311 | 2,097 | 1,896 |
| 1.5 | 0.065 | 30,000 | 75,000 | 7,117 | 1,779 | 2,847 | 2,487 |
| 1.5 | 0.083 | 30,000 | 75,000 | 9,333 | 2,333 | 3,733 | 3,136 |
| 1.5 | 0.095 | 30,000 | 75,000 | 10,878 | 2,719 | 4,351 | 3,559 |
| 1.5 | 0.109 | 30,000 | 75,000 | 12,754 | 3,188 | 5,101 | 4,043 |
| 1.5 | 0.12 | 30,000 | 75,000 | 14,286 | 3,571 | 5,714 | 4,416 |
| 1.5 | 0.134 | 30,000 | 75,000 | 16,315 | 4,079 | 6,526 | 4,881 |
| 1.5 | 0.148 | 30,000 | 75,000 | 18,439 | 4,610 | 7,375 | 5,336 |
| 1.75 | 0.035 | 30,000 | 75,000 | 3,125 | 781 | 1,250 | 1,176 |
| 1.75 | 0.049 | 30,000 | 75,000 | 3,864 | 966 | 1,546 | 1,434 |
| 1.75 | 0.065 | 30,000 | 75,000 | 6,019 | 1,505 | 2,407 | 2,146 |
| 1.75 | 0.083 | 30,000 | 75,000 | 7,860 | 1,965 | 3,144 | 2,711 |
| 1.75 | 0.095 | 30,000 | 75,000 | 9,135 | 2,284 | 3,654 | 3,080 |
| 1.75 | 0.109 | 30,000 | 75,000 | 10,672 | 2,668 | 4,269 | 3,504 |
| 1.75 | 0.12 | 30,000 | 75,000 | 11,921 | 2,980 | 4,768 | 3,832 |
| 1.75 | 0.134 | 30,000 | 75,000 | 13,563 | 3,391 | 5,425 | 4,242 |
| 1.75 | 0.148 | 30,000 | 75,000 | 15,268 | 3,817 | 6,107 | 4,645 |
| 1.75 | 0.165 | 30,000 | 75,000 | 17,430 | 4,357 | 6,972 | 5,124 |
| 2 | 0.035 | 30,000 | 75,000 | 2,720 | 680 | 1,088 | 1,032 |
| 2 | 0.049 | 30,000 | 75,000 | 3,864 | 966 | 1,546 | 1,434 |
| 2 | 0.065 | 30,000 | 75,000 | 5,214 | 1,303 | 2,086 | 1,887 |
| 2 | 0.083 | 30,000 | 75,000 | 6,788 | 1,697 | 2,715 | 2,387 |
| 2 | 0.095 | 30,000 | 75,000 | 7,873 | 1,968 | 3,149 | 2,715 |
| 2 | 0.109 | 30,000 | 75,000 | 9,175 | 2,294 | 3,670 | 3,092 |
| 2 | 0.12 | 30,000 | 75,000 | 10,227 | 2,557 | 4,091 | 3,384 |
| 2 | 0.134 | 30,000 | 75,000 | 11,605 | 2,901 | 4,642 | 3,751 |
| 2 | 0.148 | 30,000 | 75,000 | 13,028 | 3,257 | 5,211 | 4,111 |
| 2 | 0.165 | 30,000 | 75,000 | 14,820 | 3,705 | 5,928 | 4,542 |
