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Location: HOME > PRODUCTS > Other pipe fittings / accessories > Carbon steel pipe fittings

Carbon steel pipe fittings

(Butt-welded pipe fittings, socket-welded/threaded pipe fittings, flanges，etc).Exported carbon steel pipe fittings mainly include three categories: butt-welded pipe fittings, socket-welded/threaded pipe fittings, and flanges. The materials used in the production of pipe fittings are mainly 20#, Q235B, A105, and 16Mn (Q355B). The standards implemented include the American standard ASME B16 series, the Chinese standard GB/T 12459/13401, the European standard EN 10253, and the API system.

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Bestseller Material Standards

China GB	USA ASTM	Europe EN	Japan JIS	Application
Q235B	A283 Gr.D	S235JR	SS400	General structure
20#	A106B/A234 Gr.WPB	P235GH	STPG370	Fluid / Socket-welded pipe fittings
16Mn(Q355B)	A572 Gr50	S355JR	SM490B	Low alloy high strength
20G	A106B	P235GH	STBA20	Boiler / High temperature
A105（Forged piece）	A105	C22.8	S25C	Flange / Socket-joint component

We professionally supply export-grade carbon steel pipe fittings, covering a full range of products including butt-welded pipe fittings, socket-welded pipe fittings, threaded pipe fittings, flanges, and blind flanges. Our product range includes elbows, tees, reducers, pipe caps, crosses, flanges, slip-on flanges, butt-welded flanges, blind flanges, and figure-eight blind flanges, meeting the piping system needs of various fields such as petroleum, chemical, power, gas, water supply and drainage, and steel structures.

Common materials used in our products include high-quality carbon steel and pipeline steel such as 20#, Q235B, 16Mn (Q355B), A105, A234 WPB, A106 Gr.B, and API 5L Gr.B/X42/X52/X60, strictly adhering to internationally recognized standards and suitable for use in normal temperature, medium and high pressure, and low temperature conditions.

Production and acceptance strictly adhere to mainstream domestic and international standards such as ASME B16.9, ASME B16.11, ASME B16.5, GB/T 12459, GB/T 13401, EN 10253, and API 5L. Pressure ratings cover Class 150/300/600/900/1500 and PN10/16/25/40/63/100, with sizes ranging from NPS 1/2" to 48" (DN15～DN1200). Various connection methods, including butt welding, socket welding, and NPT/BSPT threads, can be provided according to customer requirements. The products are stable in performance, have high dimensional accuracy, and are suitable for various pipeline engineering projects exported worldwide.

Carbon Steel Pipe Fittings – Surface Treatment

We provide a full range of surface treatment options for carbon steel pipe fittings to meet different export requirements and working conditions, including:

Black Painting / Black Coating

Common anti-rust treatment for general-purpose carbon steel fittings, economical and widely used in pipeline projects.

Red Paint / Anti-rust Primer

Applied for better corrosion resistance and easy identification on construction sites.

Hot Dip Galvanized (HDG)

Excellent corrosion protection for outdoor, water supply, firefighting and marine applications, with long service life.

Electro Galvanized / Cold Galvanized

Light anti-rust treatment for small-sized and low-pressure fittings.

Bead Blasting / Sand Blasting

Clean surface treatment to remove oxide scale, oil and impurities, often used before painting or galvanizing.

Oil Coating / Anti-rust Oil

Temporary rust prevention during transportation and storage, widely used for seamless and alloy steel fittings.

Passivation

For improved surface finish and rust resistance, mainly used in high-standard industrial piping systems.

Customers can also specify customized surface treatments according to project standards and delivery requirements.

We offer standard export packing for carbon steel pipe fittings to ensure safe transportation and long-term storage. Main packing methods include:

Shrink wrapping + plywood case

Carton box + pallet

Bundles with steel strips

Wooden crate packing

Container loading with dunnage

Payment Methods

Flexible payment terms available: T/T and L/C. For new clients, 30% advance payment for production, balance against copy of B/L. L/C is acceptable for large & regular orders to secure both parties.

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Warehousing Management

Before each batch of steel leaves the factory, a complete process inspection is strictly carried out. From chemical composition, mechanical properties to dimensional tolerance and surface quality, each item is carefully checked to ensure compliance with national standards and export regulations. At the same time, the quantity, packaging and rust prevention treatment are also verified. An original factory warranty certificate is attached, guaranteeing the quality. Before shipment, inspection photos are provided. Any non-compliant items will not be released, and the quality is fully controllable throughout the process. This ensures your overseas purchasing is safe and worry-free.

All items are visually inspected before delivery. No cracks, deformation, rust, scratches or cutting marks are allowed; edges must be smooth. Only visually sound products will be shipped.

Thickness, width, length, wall thickness, outer diameter have been measured. Straightness, curvature, torsion, diagonal tolerance all meet the corresponding tolerance requirements.

Quality inspection includes: mechanical property tests (yield strength, tensile strength), elongation rate, impact energy, hardness testing, chemical composition testing, process performance testing, etc.

Inspection according to packaging requirements: secure binding, moisture-proof film, rust-proof paper, export fumigation/fumigation-free wooden crates, shipping marks, gross weight, net weight, etc.

We will provide full reception services to support the customers' on-site inspection of the goods.

Hot Rolling Production Line

Cold rolling precision processing

Cold drawing/cold rolling line

Hot Rolling Production Line

Hot rolling production line (producing hot-rolled coils/medium-thick plates, thickness 2–60mm)

Cold rolling precision processing

(Producing ultra-thin / high-precision / shiny panels, with thickness ranging from 0.1 to 3mm, for high-end products)
Cold drawing/cold rolling line

(High-precision cold-drawn round steel, square steel, hexagonal steel, and special-shaped bars)

Cold drawing/cold rolling line

(High-precision cold-drawn round steel, square steel, hexagonal steel, and special-shaped bars)

Warehousing Management

A ten-thousand-ton standardized warehouse with grid-based zoning and system positioning enables rapid material retrieval and reduces the time spent searching for materials.

Inbound inspection: Verify the physical items against the inbound form, inspect the appearance, dimensions, and labels. Once confirmed to be correct, the materials are entered into the ERP system and processed for storage.

Logistics and Global Delivery: Self-operated fleet + contracted logistics partners; expedited service available for urgent orders.

International Shipping: Supports FOB, CIF, DDP, and other trade terms, covering 100+ countries and regions.

Process: Booking → Trucking → Customs Declaration → Loading onto Ship/Aircraft → Bill of Lading Issuance → Document Delivery → Destination Port Customs Clearance (Optional) → Last-Mile Delivery.

Provides door-to-door one-stop logistics with full tracking to ensure safe and timely arrival of goods.

After-Sales Service and Traceability: Delivery receipts, logistics information, and quality inspection documents are sent to customers within 24 hours of shipment.

Established a full product lifecycle traceability system, allowing tracking of production, quality inspection, warehousing, and transportation records.

Follow-up inspection within 72 hours of arrival; rapid response and handling of quality issues; assistance in resolving customs clearance issues for foreign trade orders.

Packaging Method