ASTM A53 GR.A po'lat quvuri uchun asosiy dasturlar nima?
U past - bosimli bosimli suyuqlik (suv, gaz, neft), qurilish inshootlari (iskala, gidravlik, gidravlik va qishloq xo'jaligini sug'orish). Bu yuqori xarajatlarni - - yomon sharoitlar (harorati -29 darajadan 425 daraja) uchun mos keladi. Galvanizli versiyalar ko'pincha tashqi korroziyadan himoyalanish uchun ishlatiladi (masalan, ko'chada nur ustunlari kabi). Ba'zi neft-kimyo loyihalari uni jarayoni quvur sifatida ishlatishadi (Asme b31.3 qo'shimcha talablariga muvofiq).
ASTM A53 GR.A va Gr.B po'lat quvurini qanday tanlash kerak?
Gr.A pastki kuchga ega (205 mpa vab. gr.b 240 MPA), ammo eng yaxshi ishlashni taklif qiladi va bükme yoki payvandlangan tuzilmalarni yaxshilaydi. GR.B yuqori - bosimli quvurlar uchun ko'proq mos keladi (masalan, API 5L dasturlari). GR.A, odatda, narx nuqtai nazaridan 5-10% arzonroq. Agar dizayn bosimi 1,6 MPa dan kam yoki teng bo'lsa va diniy yuklar bo'lmasa, Gr.A-ni tanlang; Aks holda, Gr.B ni tanlang. Ikkala ham shunga o'xshash korroziyaga o'xshash qarshilikka ega, shuning uchun tanlov jarayoni mexanik talablar va iqtisodiy fikrlarni ham ko'rib chiqishi kerak.
ASTM A53 Gr.A po'lat quvurining bozor narxiga qanday omillar ta'sir qiladi?
Prices fluctuate with steel futures (such as iron ore and coke). The average price of carbon steel in 2023 was approximately $800/ton. Galvanized pipe is 20-30% more expensive than black pipe. Transportation costs (sea/land) and tariffs (such as US anti-dumping duties on China) are key variables. Seasonal demand (such as the peak infrastructure construction season) can also drive up prices. Large purchase volumes (>50 tonna) odatda 5% chegirma oladi.
ASTM A53 GR.A po'lat quvurini qanday tanlash mumkin?
To'g'ri, ISO 9001 sertifikatlangan va Astm sertifikatlangan ishlab chiqaruvchilari tavsiya etiladi. Moddiy sifatni sertifikatlash (MTC) va uchinchi - partiyasining uchinchi - - {SGS kabi) talab qilinadi. Ishlab chiqarish uskunalarini (masalan, doimiy aylanma tegirmonlar va gidrostatik test uskunalari) tekshiriladi. Maxsus buyruqlar uchun 60 kun davomida etkazib berish vaqtini baholang (15 kun, 30 {{{{{{- 60 kunlik buyurtma uchun 60 kun. Sotishdan keyingi xizmat (masalan, sifatli da'volarga javob berish) ham muhim ahamiyatga ega.
API 5L po'lat quvurini astm a53 pyuresi bilan almashtirishi mumkinmi?
U API 5L gr.a-ni past - bosimga almashtirishi mumkin (<2 MPa) and ambient temperature conditions, but API 5L has stricter requirements (such as the Charpy impact test). API 5L PSL2 must be used in sour environments (H2S). If the project specifications explicitly require API standards (such as oil and gas pipelines), substitution is not possible. Written confirmation from the designer and a lifecycle cost assessment are required before substitution is considered.
