ASTM A307 Blind Flanges

ASTM A307 Blind Flanges refers to standard carbon steel blind flanges (typically conforming to ASTM A105) that are paired with ASTM A307 Grade A or B bolting materials. Blind flanges are solid disc fittings used to seal off the end of a piping run or a pressure vessel opening. The A307 specification covers carbon steel bolting materials (bolts, stud bolts, and threaded rods) intended for general purpose applications, particularly where pressure and temperature conditions are mild (e.g., up to 450°F). Zeron Fasteners supplies these flanges and associated A307 fasteners for use in utility lines, low-pressure plumbing, and non-critical industrial services where cost-effectiveness and reliable sealing are the primary requirements.

Related Products

ASTM A307 Hex Bolts ASTM A307 Stud Bolts ASTM A307 Nuts Carbon Steel Blind Flanges Carbon Steel Pipe Fittings ASTM A307 Threaded Rods
ASTM A307 Blind Flanges

ASTM A307 Grade A Bolting Chemical Composition (for Flange Assembly)

Element Content (%)
Carbon (C) 0.28 max
Manganese (Mn) 1.20 max
Phosphorus (P) 0.040 max
Sulfur (S) 0.050 max
Silicon (Si) —

ASTM A307 Grade A Bolting Mechanical Properties (for Flange Assembly)

Property Value (min)
Tensile Strength 60 ksi (414 MPa)
Yield Strength Not specified
Elongation in 2 in. (50mm) 18%
Hardness (Brinell max) N/A (Generally lower than 183 HB)

ASTM A307 Blind Flanges Feature Products

Super Duplex S32750 Flanges Monel 400 Socket Cap Screws SS 316 Pipe Fittings Alloy Steel Cap Screws

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