Spectacle Blind
● For pipeline maintenance isolation, equipment spare connections, and process system shutdown; compensates for the risk of imperfect valve closure, applied at flange positions requiring frequent switch‑over between open and closed states.
Product Model
Description
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Product Overview
Clamped between flanges; solid end in‑place for pipeline isolation, hollow ring end in‑place for pipeline flow‑through.
Core Technical Parameter Table
Parameter Item Parameter Value Product Name Spectacle Blind Applicable Standard ASME B16.48 GB Standard Materials Carbon Steel:20#
Alloy Steel:16Mn、20MnMo、15CrMo、12Cr1MoV、14Cr1Mo、12Cr2Mo1、12Cr2Mo1V、12Cr5Mo、10Cr9Mo1VNbN、30CrMo、35CrMo
Low Temperature Steel:16MnD、20MnMoD、09MnNiD
Austenitic Stainless Steel:S30408 (304)、S30403 (304L)、S30409 (304H)、S32168 (321)、S32169 (321H) 、S34778 (347)、S34779 (347H) 、S31608 (316) 、S31603 (316L) 、S31609 (316H)
Duplex Stainless Steel:S22053 (2205)ASTM & ASME Materials Carbon Steel:A105
Low Temperature Carbon Steel (A350):LF2、LF3、LF6
Line Pipe Steel (A694):F52、F60、F65、 F70
Low Alloy Steel (A182):F5、F5a、F9、F91、F92、F11 (Cl.1/2/3)、F22 (Cl.1/3)
Austenitic Stainless Steel (A182):F304、F304L、F304H、F316、F316L、F316H、F321、F321H、F347、F347H
Duplex Stainless Steel (A182):F51 (2205)、F60 (S32205)Size Range 1/2"‑24" (DN15‑DN600) Pressure Class 150#, 300#, 600#, 900#, 1500#, 2500# Gasket Face Type RF、RTJ Manufacturing Process Forged Marking Permanent steel stamping (Nominal Diameter, Pressure Class, Material Grade, Heat Number, Standard No.) Application Scenarios Oil & gas, refinery, petrochemical, power plant; for pipeline isolation and maintenance shutdown Production Process
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Qualification
Spectacle Blind
● For pipeline maintenance isolation, equipment spare connections, and process system shutdown; compensates for the risk of imperfect valve closure, applied at flange positions requiring frequent switch‑over between open and closed states.
OUR SERVICE
We offers a wealth of product support resources, including a range of technical and downloadable product manuals to product certifications.
Our Service Product CatalogCOMPANY STRENGTHS
Experience
26 years of professional pipe fittings production and customization experience, with 45 senior technical engineers to support project development.
OEM/ODM
Full support OEM & ODM customization. We produce carbon/alloy/stainless steel fittings with 1000+ specs complying with GB, ASME, DIN, JIS standards.
Reliable Quality
Strict raw material selection & full-process inspection. Our lab equips complete devices for chemical analysis, mechanical test and NDT.
Certification
Possess full authoritative qualifications: ISO triple system, API Spec Q1, national pressure pipeline manufacturing license, EN10204 test certificates available.
Export
Located in Mengcun pipe fittings hub adjacent to Huanghua Port. Products cover all China provinces and export to Southeast Asia, Middle East, South America and more.
Advanced Equipment & Tech
200+ sets of advanced forging, CNC machining and full inspection equipment, annual output reaches 20,000 tons of high-pressure pipe fittings.