Product description

Blind flange is also called blind board, and its proper name is flange cover. It is a flange without holes in the middle for sealing the pipe plug. There are many types of sealing surface, such as rise face, ring joint face, large or smalltongue face and groove face, large or small male face and female face. Blind flanges are mostly used to seal the end or opening of a pipe, which is why they come without a bore. This comes in handy for inspection and pressure tests, as it allows quick access to the pipe.

Blind Flange Forming:

Forged

Blind Flange Material

Stainless Steel:

OCr18Ni9, 0Cr18Ni9Ti, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, 00Cr19Ni10, 00Cr17Ni14Mo2, ASTM A182-F304, F304L, F304H, F316, F316L, F321, F321H, F347H, F317,

Super austenitic stainless steel：

ASTM A182-904L, 317, 317L

Duplex Stee：

ASTM A182-F51, F53, F44

Special steel ：

N06600, N08800, N08811

Alloy Steel:

16Mn, 12CrMo, 15Cr5Mo, Cr5Mo, 12Cr1MoV, ASTM A182-F11, F22, F91 F9  F5

PIPE LINE：

ASTM A694-F42, F46, F48, F50, F52, F56, F60, F65, F70, F80

Carbon Steel ：

ASTM A350-LF2, LF3  Q235A, 20#, ASTM A105

Blind Flange Standard &Size &Rate

DIN2527: DN10-DN500

ASME/ANSI B16.5:  1/2"-24" 150LB 300LB 600LB 900LB 1500LB

1/2"-12" 2500LB

ASME B16.47 SERIE A/B: 26"-28" 150LB 300LB 600LB 900LB

Blind Flange Tests and Inspections

Analytic instrument of C&S

Machine Performance Test

Chemical Composition Analysis

Permeation Test

Ultrasonic Test

Metallographic microscope Test

Intergranular Corrosion Test

Hardness Test

Flattening Test

Ferrite test

Impact Test(Low temperature, Normal temperature,-196 temperature.)

Test methods for pitting corrosion resistance

X-ray flaw detection

Magnetic particle inspection

Blind Flange Documentation Offered

Raw Material Test Report

EN10204 3.1 Test Certificate

Heat Treatment Chart

Heat Treatment Report

Quality Assurance Plan

Inspection and Test Procedure Report

Blind Flange Application

Stainless steel blind flange  uses in oil and gas pipeline

Blind flange uses in chemical industry

Alloy steel blind flange uses in plumbing

BLRF flange uses in water supply systems

Asme b16.5 blind flange uses in power plant

Nickel alloy flange uses in paper industry

Monel 400 blind  flange uses in general purpose applications

Monel 800 blind flange uses in fabrication industry

254Mo blind flange uses in petroleum

C-276 blind flange uses in papermaking

Alloy 20 blind flange uses in shipbuilding

High quality blind flange uses in petrochemical

Dulex steel blind flange uses in natural gas industry

Super duplex steel blind flange uses in ocean engineering

Duplex steel 45 degree elbow uses in nuclear industry

Hastelloy raised face blind flange uses in food and beverage

Raised face blind flange uses in electrical powerplant

Ss blind flange uses in pharmacy