ʻO ASTM A888 Paipu Hao a me ka hoʻopili ʻana

Hoʻohana nui ʻia nā paipu lepo hao ʻole Hubless a me nā mea pono i hana ʻia e ka ʻenehana centrifugal i loko o ka paipu hoʻoheheʻe ma o kahi loulou hikiwawe.Loaʻa ka huahana i nā kūlana ASTM A888, CISPI301 a loaʻa iā ia nā mea maikaʻi aʻe:

 ◆Paʻa a pololei, ʻo ka mānoanoa o ka pā paipu, ka ikaika kiʻekiʻe a me ka haʻahaʻa, ka ʻoluʻolu kiʻekiʻe ma ka ʻaoʻao o loko a me waho o ka pā, ʻaʻohe kīnā i ka foundry,

◆ Hoʻokomo maʻalahi, mālama maʻalahi,

◆Ke ola lōʻihi, kōkua i ke kaiapuni, pale ahi a ʻaʻohe leo.

I loko a me waho: ka uhi pena bituminous. 

Nui: 1.5″, 2″, 3″, 4″, 5″, 6″, 8″, 10″, 12″, 15″ 

ʻĀpana kemika hao hina hina:

P＜0.38 S＜0.15 Cr＜0.50 Ti＜0.10 Al＜0.50 Pb＜0.015 C+(Si+P)/3 CE＞4.10

ʻO nā mea mīkini hao hina hina: ＞145Mpa