·Type  
weld neck flange / slip on flange / threaded flange / lapped flange / socket weld flange / blind / long welding neck flange / orifice slip on flange / orifice weld neck flange
·Specification
ASME B16.5/ B16.36 / BS 3293 / MSS SP 44 / API 6A / API 605
·Dimension
1/2” – 48”
·Connection facing
Raised face / Ring joint / Flat face
·Pressure class
150# / 300# / 400# / 600# / 900# / 1500# / 2500# 
Carbon & Alloy Steel：
ASTM A105, ASTM A350: LF1/LF2 / LF3 / LF5 / LF6 / LF9 / LF787
MSS SP-75: WPHY42 / WPHY46 / WPHY52 / WPHY60 / WPHY65 / WPHY70 /WPHY80
ASTM A515: GR.60 / GR.65 / GR.70
ASTM A516: GR.60 / GR.65 / GR.70
Stainless Steel：
ASTM A182: F304 / F304L / F304H / F316 / F316L / F317L / F321 / F321H / F347 / F347H / F51 / F53
Special alloy steel:
Hastelloy B-2, Hastelloy C, Hastelloy C-276, Hastelloy C-4, Incoloy A-286, Incoloy 800HT, Incoloy 825, Inconel 600, Inconel 625, Inconel X-750, Inconel 718, Nimonic 80A, Nimonic 90, Nimonic 93