RP nga miihini whakairoiro RP e whakamahia whānuitia ana i roto i te iti o te arc arc hiko mo te kowiri, silicon, phosphorus, me te hanga konumohe. He pai ki a raatau mo nga ahuatanga o naianei, ko te whakarato i nga mahi hiko hiko me te pumau i te waikawa - he tino kaha ki nga tikanga metallurgoriwi tuku iho.
p>Ko te RP nga miihini whakairoiro e hangaia ana ma te whakamahi i te hinu hinu-kounga nui i te hinu i roto i te hinu petrochina fushnun. Kei roto i te mahinga whakangao, ko te puranga, te pokepoke, te hanga, te tunu, te whakairoiro, me te miihini. Ka hangaia nga nipples ma te whakamahi i te tiihi me te hinu hinu, ka tukatukahia me te whaainga kotahi-wa me te tunu kai, te whakarite i te aro turorotanga me te waiariki.
Ko nga rawa o te tinana me te miihini
Parapara | Aronui | Diameter nominal (mm) | 100 ~ 200 | 250 ~ 300 | 350 ~ 600 | 780 ~ 1400 |
Whakahē | μω ωω · m | Hikohiko | 7.5 ~ 8.5 | 7.5 ~ 8.5 | 7.5 ~ 8.5 | 8.5 ~ 10.5 |
Kōmata | 5.8 ~ 6.5 | 5.8 ~ 6.5 | 5.8 ~ 6.5 | 5.8 ~ 6.5 | ||
Te kaha o te kaha | Mai | Hikohiko | ≥ 10.0 | ≥ 9.0 | ≥ 8.5 | ≥ 7.0 |
Kōmata | ≥ 16.0 | ≥ 16.0 | ≥ 16.0 | ≥ 16.0 | ||
Modulus ngawari | Fpa | Hikohiko | ≤ 9.3 | ≤ 9.3 | ≤ 9.3 | ≤ 12.0 |
Kōmata | ≤ 13.0 | ≤ 13.0 | ≤ 13.0 | ≤ 13.0 | ||
Te kaha | g / cm³ | Hikohiko | 1.55 ~ 1.64 | 1.55 ~ 1.64 | 1.55 ~ 1.63 | 1.55 ~ 1.63 |
Kōmata | ≥ 1.74 | ≥ 1.74 | ≥ 1.74 | ≥ 1.74 | ||
Tuhinga o mua | 10⁻⁶ / ° C | Hikohiko | ≤ 2.4 | ≤ 2.4 | ≤ 2.4 | ≤ 2.4 |
Kōmata | ≤ 2.0 | ≤ 2.0 | ≤ 2.0 | ≤ 2.0 | ||
Ihirangi pungarehu | % | ≤ 0.3 | ≤ 0.3 | ≤ 0.3 | ≤ 0.3 |
Whakaaetia te kaha o naianei
Diameter nominal (mm) | Te Whakaaetanga (a) | Te Whakataetae o naianei (A / CM²) | Diameter nominal (mm) | Te Whakaaetanga (a) | Te Whakataetae o naianei (A / CM²) |
100 | 1500 ~ 2400 | 19 ~ 30 | 400 | 18000 ~ 23500 | 14 ~ 18 |
150 | 3000 ~ 4500 | 16 ~ 25 | 450 | 22000 ~ 27000 | 13 ~ 17 |
200 200 | 5000 ~ 7000 | 15 ~ 21 | 500 | 25000 ~ 32000 | 13 ~ 16 |
250 | 7000 ~ 10000 | 14 ~ 20 | 550 | 28000 ~ 34000 | 12 ~ 14 |
300 | 10000 ~ 13000 | 14 ~ 18 | 600 | 30000 ~ 36000 | 11 ~ 13 |
350 | 13500 ~ 18000 | 14 ~ 18 | 780 ~ 1400 | 57000 ~ 108000 | 12 ~ 8 |