Large-Bore Flow Control: Haihao Group Dispatches ASTM A234 WPB 90° Elbows to Singapore

Haihao Group has completed the dispatch of a large-diameter carbon steel elbow shipment engineered for an offshore terminal and industrial fluid handling expansion project in Singapore. Built in strict accordance with ASME B16.9 dimensional standards, this cargo features 90-degree long radius (LR) elbows spanning nominal bore sizes from 200NB (8″) up to 900NB (36″) in Schedule 40 and Schedule STD wall thicknesses.

Shipment Manifest & Engineering Specifications

Sourcing from an established ASME B16.9 ASTM A234 WPB elbow manufacturer guarantees precise centerline radius dimensions, uniform wall thickness along the extrados (back arc), and smooth internal flow transitions. Below is the specification manifest for the Singapore cargo:

Medium to Large-Bore SCH 40 90° LR Elbows: 200NB (8″), 300NB (12″), 350NB (14″), 400NB (16″), 450NB (18″), and 500NB (20″) | Material: ASTM A234 Grade WPB | Standard: ASME B16.9 | Bevel: 37.5° Butt Weld.

Heavy Large-Bore SCH 40 90° LR Elbows: 550NB (WT: 15.09 mm), 600NB (24″), 700NB (WT: 17.48 mm), 750NB (WT: 17.48 mm), 800NB (32″), and 900NB (36″) | Material: ASTM A234 Grade WPB | Standard: ASME B16.9 | Bevel: 37.5° Butt Weld.

Large-Bore SCH STD 90° LR Elbows: 450NB (18″), 500NB (20″), 550NB (22″), 600NB (24″), 700NB (28″), 750NB (30″), 800NB (32″), and 900NB (36″) | Material: ASTM A234 Grade WPB | Standard: ASME B16.9 | Bevel: 37.5° Butt Weld.

ASME B16.9 ASTM A234 WPB elbow manufacturer exporting large bore 90 degree long radius carbon steel elbows

Forging Integrity & Wall Thickness Consistency

In large-bore piping systems handling high fluid velocity, 90-degree directional changes induce intense hydraulic thrust and friction loss. Using long radius elbows (centerline radius R = 1.5D) reduces pressure drop and minimizes erosion compared to short radius configurations.

Every fitting produced by our ASME B16.9 ASTM A234 WPB elbow manufacturer facility undergoes controlled hot-push forming followed by stress-relief heat treatment. Special manufacturing focus was placed on maintaining back-arc wall thickness—ensuring that heavy-wall items like 550NB (15.09 mm WT) and 700NB/750NB (17.48 mm WT) maintain at least 87.5% of nominal wall thickness across the entire bend arc.

Quality Assurance, Bevel Machining & Surface Protection

As a trusted ASME B16.9 ASTM A234 WPB elbow manufacturer, Haihao Group implemented strict quality management protocols prior to maritime packaging:

3D Ultrasonic Wall Thickness Gauging: Multi-point ultrasonic thickness (UT) measurements were executed across the throat, extrados, and bevel ends to verify full schedule compliance.

CNC Bevel Machining: Welding bevels were CNC-turned to 37.5° with smooth root faces to facilitate fast, high-quality field butt-welding on active project sites.

Surface Preservation: All carbon steel surfaces received an industrial black rust-inhibiting varnish, and large-bore open ends were fitted with wooden or plastic bevel protectors to withstand humid ocean transit to Singapore.

Mill Test Certification: Supplied with complete EN 10204 3.1 Mill Test Certificates covering chemical composition, mechanical tensile/yield testing, and non-destructive examination (NDE) records.

Partnering with a proven ASME B16.9 ASTM A234 WPB elbow manufacturer gives engineering contractors full assurance of dimensional repeatability and field installation efficiency.

Request Your Singapore Project Quotation Today

In need of large-bore ASME B16.9 carbon steel elbows, SCH 40 / SCH STD seamless fittings, or custom heavy-wall piping components for your energy infrastructure? Partner with an industry-leading ASME B16.9 ASTM A234 WPB elbow manufacturer. Contact the Haihao Group commercial engineering team today for fast pricing and technical support.