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Hardware & tools
Spectacle Blind
Spectacle Blinds are line isolation components used in industrial piping systems to provide visible and reliable shut-off during maintenance, inspection, or process changeover.
SupplierYongxin Sheng Heavy Industry International Co., Ltdwww.yxs-forging.com
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About this product
Product information from the supplier.
Product Overview
Spectacle Blind is supplied for pressure piping projects where compliance with the requested standard, pressure class, facing type, and drilling pattern is essential. Although the finished flange may look simple, real purchasing decisions are usually controlled by dimensional compliance, traceability, heat-treatment status, NDT scope, and reliable machining accuracy.
Spectacle blinds are used in piping systems that require positive isolation combined with convenient line management. In supply terms, the main concerns are dimensional compliance, correct thickness, material traceability, and reliable machining of the ring and blind portions.
Detailed Parameters
Product Code | 16005 |
Typical Materials | A105, A350 LF2, A182 F304/F316/F51/F11/F22 and other flange grades to applicable standard |
Typical Size Range | Size, pressure class, facing, drilling, standard system, and project dimensions arranged to specification |
Supply Condition | As forged / heat treated / machined according to standard and project scope |
Machining Scope | Facing, bore, drilling, beveling, serration, tapping, and project-specific flange machining |
Inspection Options | UT/MT/PT, PMI, hardness, dimensional checks, hydro test if applicable, and third-party witness |
Documentation | EN 10204 3.1, heat-treatment record, dimensional report, NDT report, marking list, and project-specific dossier |
Typical Applications | Positive isolation in piping; Line blinds and spacers; Maintenance isolation points; Process line switching service |
Commercial Note | Dimensions, heat treatment, machining allowance, and inspection scope can be arranged according to drawing and project specification. |
Key Advantages
Standard Compliance — Dimensions, facing, drilling, and pressure class can be supplied according to the requested flange system and project standard.
Reliable Forged Base Material — Forged flange production improves material consistency compared with low-control alternatives and supports pressure-service confidence.
Machining Accuracy — Bore, facing, serration, bevels, and drilling can be machined to suit the intended application and inspection scope.
Wide Material and Standard Range — ASME, EN, DIN, JIS, and project-specific supply can be supported with suitable materials and pressure classes.
Project Documentation — EN 10204 3.1, marking, NDT reports, and third-party witness support can be arranged where required.
Typical Applications
• Positive isolation in piping
• Line blinds and spacers
• Maintenance isolation points
• Process line switching service
Supply Scope and Inspection
Spectacle Blind can be supplied as a forging blank, heat-treated forging, rough-machined forging, or semi-finished part according to the customer’s process route. Where the project requires closer dimensional control, additional OD/ID/facing, journal, bore, or drilling work can be incorporated before shipment.
For inspection-sensitive orders, Yongxinsheng can coordinate ultrasonic testing, MT/PT where applicable, PMI, hardness checks, mechanical testing, marking, EN 10204 3.1 documentation, and third-party witness arrangements. This makes the product suitable not only for general industrial procurement but also for project-based orders with stricter quality-document requirements.
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Yongxin Sheng Heavy Industry International Co., Ltd
