Haihao Group Supplies ASME B16.5 & ASME B16.47 A350 LF2 CL1 Blind Flanges for Belarus Project
Haihao Group recently completed the production and shipment of a large batch of blind flanges for a customer in Belarus. The order includes a wide range of pressure classes, sizes, and facing types manufactured according to international flange standards. The products are mainly made from ASTM A350 LF2 CL1 carbon steel, with strict requirements for heat treatment, material performance, and low-temperature impact properties.
For this project, Haihao Group supplied A350 LF2 CL1 blind flange products covering sizes from small diameter connections to large-diameter pipeline applications. The complete order demonstrates Haihao’s capability in manufacturing customized forged flanges for demanding industries such as oil & gas, petrochemical, power generation, and pipeline engineering.
A350 LF2 CL1 blind flange ASME B16.5 forged flange shipment for Belarus pipeline project
Project Overview: Large Quantity Blind Flange Supply for Belarus Customer
The Belarus customer required blind flanges with different pressure ratings, including CL150, CL300, CL600, and CL900. The supplied products comply with ASME B16.5 and ASME B16.47 Series A standards, covering various sizes and sealing surfaces.
The main products included:
- Blind flanges ASME B16.5 A350 LF2 CL1
- Large diameter blind flanges ASME B16.47 Series A
- RF (Raised Face) blind flanges
- RJ (Ring Joint) blind flanges
- Pressure classes from 150# to 900#
- Sizes ranging from 3/4″ to 52″
Representative items include:
- 20″ CL900 RJ blind flange ASME B16.5 (A350 LF2 CL1)
- 32″ CL900 RJ blind flange ASME B16.47 Series A (A350 LF2 CL1)
- 52″ CL150 RF blind flange ASME B16.47 Series A (A350 LF2 CL1)
- 36″ CL600 RJ blind flange ASME B16.47 Series A (A350 LF2 CL1)
The diversified product range required precise control of forging, machining, heat treatment, and inspection processes.
Material Performance of ASTM A350 LF2 CL1 Blind Flanges
The selected ASTM A350 LF2 CL1 material is widely used for pressure-containing components that require reliable mechanical properties under low-temperature conditions. During manufacturing, Haihao Group strictly follows customer requirements to ensure stable chemical composition and mechanical performance.
For this order, the A350 LF2 CL1 blind flange products were supplied with heat treatment to guarantee material performance. The flanges were required to meet low-temperature impact requirements at -46℃, ensuring suitability for applications exposed to cold environments.
Key quality requirements included:
- Heat treatment included to maintain material properties
- Compliance with ASTM A350 LF2 CL1 material requirements
- Low-temperature impact test at -46℃
- Mechanical performance verification
- Material traceability through inspection documents
These requirements are especially important for pipeline systems operating in harsh climates, where flange reliability directly affects equipment safety and service life.
Manufacturing According to ASME Flange Standards
As a professional flange manufacturer, Haihao Group produces forged flanges according to widely recognized standards. The A350 LF2 CL1 blind flange supplied for this Belarus project was manufactured based on ASME dimensional and pressure requirements.
For standard ASME B16.5 flanges, Haihao Group controls:
- Outside diameter and bolt hole dimensions
- Facing type accuracy
- Pressure class requirements
- Machining quality
- Surface condition
For large diameter applications, ASME B16.47 Series A provides the dimensional basis for heavy-duty pipeline flange connections. The supplied large-size blind flanges, including 32″, 36″, 48″, and 52″ sizes, demonstrate Haihao Group’s production capability for oversized forged components.
RF and RJ Facing Options for Different Pipeline Applications
Different pipeline systems require different sealing solutions. In this project, Haihao Group provided both RF and RJ facing types.
RF blind flanges are commonly selected for general pressure piping systems because of their reliable sealing performance and wide application range.
RJ blind flanges are designed for higher-pressure services where metal ring gasket sealing is required. The supplied CL600 and CL900 RJ blind flanges are suitable for demanding applications requiring enhanced sealing reliability.
By offering multiple facing options, Haihao Group helps customers select the right flange solution according to operating pressure, temperature, and installation requirements.
Quality Control and Customer-Oriented Manufacturing
Before shipment, Haihao Group carried out inspections according to project requirements, including dimensional inspection, material verification, and performance documentation review.
Each batch was manufactured with full traceability to ensure that customers receive products matching the approved specifications.
Haihao Group’s experience in forged flanges, pipe fittings, and pipeline components enables the company to support international projects with customized solutions, whether for standard sizes or large-diameter special requirements.
For customers looking for reliable A350 LF2 CL1 blind flange suppliers, Haihao Group provides manufacturing expertise, strict quality control, and international standard compliance for oil & gas and industrial pipeline applications.