Ijikọ ọkpọkọ-nrụgide na akwa akwa (300-999 psi) chọrọ flanges threaded Class 300. The eri n'ime flange mụụrụ nke threaded flanges, makwaara dị ka screwed flanges, tinye na mpụga eri na ọkpọkọ na-enweghị ịgbado ọkụ. Ọtụtụ mgbe, ihu nke flanges ndị a na-ebuli elu, dị larịị, ma ọ bụ RTJ (njikọ ụdị mgbanaka). NPT (National Pipe Thread) na BSPT (British Standard Pipe Taper) bụ ihe atụ abụọ nke njikọ eriri. Ụdị chromium-nickel alloy 304 igwe anaghị agba nchara na-eguzogide corrosion nke mmiri, okpomọkụ, salinity, acid, mineral, na peaty ala na-ebute. Na mgbakwunye na inwe nickel karịa ụdị 304 igwe anaghị agba nchara, ụdị 316 igwe anaghị agba nchara nwekwara molybdenum maka ọbụna mma corrosion iguzogide.
Mmepe na mmepụta nke eriri eriri igwe anaghị agba nchara bụ ọpụrụiche nke JLPV. Austenitic igwe anaghị agba nchara, duplex steel, na super duplex steel bụ ihe ndị ụlọ ọrụ na-eji eme flanges ụlọ ọrụ. Ka ọ dị ugbu a, a na-ere ngwaahịa ụlọ ọrụ ahụ nke ọma na mpaghara na mpaghara China karịrị iri, gụnyere Hong Kong na Taiwan, yana na United States, Canada, Brazil, Germany, United Kingdom, France, na Middle East maka ngwaahịa ndị na-agbaso ụkpụrụ. Ụkpụrụ America na Europe. Ma ndị na-azụ ahịa ụlọ na nke mba ofesi jikọtara ọnụ na mmasị ha nwere maka ịdịmma ngwaahịa.
1.NPS:DN15-DN1000, 1/2"-40"
2. Ntụle nrụgide: CL150-CL2500, PN6-PN420
3.Standard: EN, DIN, JIS, GOST, BS, GB
4. Ihe:
① Igwe anaghị agba nchara: 31254, 904/L, 347/H, 317/L, 310S, 309, 316Ti, 321/H, 304/L, 304H, 316/L, 316H
②DP ígwè: UNS S31803, S32205, S32750, S32760
③ Alloy steel: N04400, N08800, N08810, N08811, N08825, N08020, N08031, N06600, N06625, N08926, N08031, N10276
