Singapore Shipment of A350 LF2 CL1 Flanges: Blind Flanges, Spectacle Blinds and Weld Neck Flanges

Haihao Group has completed a new flange shipment for a customer in Singapore, covering A350 LF2 CL1 flanges in several configurations, sizes and pressure classes. The order combines RF blind flanges, FF spectacle blinds and RF weld neck flanges, with pressure ratings ranging from Class 150 to Class 600.

The combination is useful for projects where different pipeline connection and isolation points need to be supplied under consistent material and dimensional requirements. All listed flanges are manufactured according to the specified ASME standards, with the sealing face and pressure class selected according to the individual item.

A Mixed Flange Order for Singapore

This shipment includes three main product groups: blind flanges, spectacle blinds and weld neck flanges.

The A350 LF2 CL1 flanges in this order cover 1″ to 8″ nominal sizes. The blind flanges are supplied with raised face (RF), while the spectacle blinds are specified with flat face (FF). The weld neck flanges are also RF type and include Schedule 40 and Schedule 80 configurations.

Here is the detailed supply scope:

A350 LF2 CL1 Material for Flange Applications

The order is centered on ASTM A350 Grade LF2 Class 1, a material specified across all three flange categories. Keeping the same material grade throughout the order simplifies material identification and procurement when a project requires several types of forged flange components.

For buyers, material consistency is particularly useful when blind flanges, spectacle blinds and weld neck flanges are purchased as part of the same piping package. The product configuration can then be matched separately to the connection or isolation point without changing the specified material.

Haihao Group A350 LF2 CL1 flanges shipment for Singapore customer

Blind Flanges for Pipeline Isolation

The shipment includes RF blind flanges in 1″ and 3″ sizes and Class 150, Class 300 and Class 600 pressure ratings.

A blind flange provides a solid end connection for closing a pipeline or equipment nozzle. Because the flange does not have a bore, it can be used where a line needs to be terminated or isolated while retaining a bolted flange connection.

The RF facing specified for these A350 LF2 CL1 flanges is also clearly identified in the order, allowing the flange facing to be matched with the corresponding piping and gasket arrangement.

Spectacle Blinds to ASME B16.48

The second product group consists of FF spectacle blinds from 1″ to 6″, with Class 150 and Class 600 ratings.

Unlike a conventional blind flange, a spectacle blind combines an open position and a closed position in one integral component. It can therefore be physically rotated between the two positions during pipeline operation or maintenance.

For this Singapore order, the spectacle blinds are specified to ASME B16.48 and use A350 Gr. LF2 CL1 material. The listed sizes include 1″, 2″, 3″, 4″ and 6″, providing a useful range for different line sizes within the project.

RF Weld Neck Flanges in Class 150 and 600

The order also includes RF weld neck flanges from 1″ to 8″. The 2″ and 4″ items are specified as Schedule 40, while the 1″, 3″, 6″ and 8″ items are Schedule 80.

All of these A350 LF2 CL1 flanges are specified to ASME B16.5 and use an RF facing. The different pressure classes and schedules reflect the actual requirements of individual piping connections rather than applying one configuration across the complete order.

This type of mixed-size order is common in industrial piping projects. A supplier needs to keep track of flange type, nominal size, pressure class, facing and material at the same time to avoid specification mismatches.

Why Specification Accuracy Matters

For a flange order containing several product types, the important details are not limited to the material grade. Each item needs to be checked against its specified:

• Product type
• Nominal size
• Pressure class
• Facing type
• Schedule, where applicable
• Manufacturing standard
• Material grade

In this shipment, blind flanges and weld neck flanges are specified to ASME B16.5, while the spectacle blinds follow ASME B16.48. The order also distinguishes RF and FF facing requirements.

For procurement teams, this level of specification is useful when reviewing quotations, drawings, material lists and inspection documentation before shipment.

Haihao Group: Flange Supply for Industrial Piping Projects

Haihao Group supplies forged flanges and related pipeline components for international industrial projects, including customized combinations of sizes, pressure ratings, materials and standards.

This Singapore shipment demonstrates our ability to handle a mixed A350 LF2 CL1 flanges order covering blind flanges, spectacle blinds and weld neck flanges within one project scope.

If your project requires ASME B16.5 flanges, ASME B16.48 spectacle blinds, RF or FF facing, or A350 LF2 material, send us your size, pressure class, material and standard requirements. Our team can review the specification and prepare a suitable quotation.