Elbows
Directional changes in 45°, 90° or custom angles. Long-radius, short-radius and reducing elbows have different space and flow characteristics.
Capability 02 路 Piping systems
Pipe fittings and flanges, matched to the line standard.
Fittings and flanges are interface products. The purchase only works when material, wall thickness, bore, facing, pressure class and dimensional standard align with the rest of the piping system. We help buyers define those interfaces before quotations are requested.
Overview
The sourcing context.
Whether the requirement is a one-off spool package or a recurring maintenance order, the sourcing brief should make the standard, schedule and traceability requirements visible from the start.
This page is a capability guide, not a product listing. It explains the common product families, the information a supplier needs and the purchasing questions worth resolving before an order. Specifications vary by model and supplier; all technical data is subject to confirmation upon inquiry.
Product scope
8 families- Stainless steel pipe fittings
- Carbon steel pipe fittings
- Elbows
- Tees
- Reducers
- Flanges
- Industrial connectors
- Custom spool and pipe assemblies
Dimensions and pressure ratings vary by standard and supplier. The applicable standard, schedule and facing should be stated in the inquiry rather than inferred from a product photo.
Product families
Common types and what distinguishes them.
Tees and crosses
Branching components in equal or reducing configurations. Run and branch dimensions, schedule and end preparation need to match the adjacent pipe.
Reducers
Concentric and eccentric transitions between line sizes. Eccentric orientation matters in horizontal liquid or vapor lines and should be specified.
Flanges
Weld-neck, slip-on, blind, threaded, lap-joint and socket-weld designs. Pressure class, facing, bore and drilling standard determine compatibility.
Couplings and caps
Full and reducing couplings, caps, plugs and unions for line closure, extension or maintenance points. Thread standard is critical for threaded items.
Industrial connectors
Flexible connectors, grooved couplings, expansion joints and specialty transitions. Confirm pressure, movement, media and end connection before comparing offers.
Custom spools and assemblies
Fabricated pipe spools, manifolds and small assemblies built to drawings. Welding procedures, inspection, marking and packaging should be agreed in the scope.
Specifications vary by model and supplier; all technical data is subject to confirmation upon inquiry.
Materials & standards
The details that change the quote.
The ranges below are common industry references, not a statement of stock or supplier capability. The applicable grade, standard and test requirement must be confirmed for the specific inquiry.
- Stainless steels
- 304, 304L, 316, 316L, 321 and selected duplex grades are common. Grade, carbon content and intergranular corrosion requirements should be stated where relevant.
- Carbon steels
- ASTM A234 WPB, A105 and equivalent grades are widely used. Impact testing, normalized condition and NACE requirements may apply in specific service.
- Dimensional standards
- ASME B16.9, B16.5, B16.11, EN 10253, DIN, JIS and other standards are not dimensionally interchangeable. Specify the exact standard and edition where required.
- Schedules and wall thickness
- Sch 10, 40, 80, 160, XS and XXS are common references, but actual wall thickness and bore must be checked against the line specification.
- Flange facing and drilling
- RF, FF, RTJ and other facings are not interchangeable. Bolt circle, hole count, hole size and facing finish must match the mating flange and gasket.
- Marking and traceability
- Heat numbers, grade marking, standard references and mill certificates can be requested. Confirm marking and certificate requirements before production.
Applications
Where these products are typically used.
- 01Process piping and skid packages
- 02Water and wastewater systems
- 03Food, beverage and hygienic lines
- 04Power and utility piping
- 05Marine and shipbuilding systems
- 06Maintenance, repair and overhaul programs
Application examples are illustrative. Suitability depends on the complete system design, operating conditions and applicable standards.
Before you buy
Purchasing considerations.
State the standard and edition
“ASME elbow” is not enough. The dimensional standard, schedule, material grade and end preparation should be explicit, especially when replacing existing components.
Check the mating interface
For flanges, confirm facing, pressure class, bolt pattern and gasket type. For fittings, confirm bore, wall thickness and end preparation against the pipe.
Think about material pairing
Dissimilar materials can create galvanic or thermal-expansion issues. The material of the fitting, pipe, flange, bolting and gasket should be considered as a system.
Agree inspection before shipment
Dimensional checks, visual inspection, PMI, pressure testing and marking verification can be included in the scope where required. Not all suppliers provide the same inspection package.
Plan packaging for the journey
Heavy or machined items need protection from impact, moisture and handling damage. Packaging and marking requirements should be part of the quotation, not a last-minute request.
How we help
Supplier discovery and quotation coordination.
- 01
Requirement review
Clarify the specification, quantity, destination and documentation needs.
- 02
Supplier shortlist
Identify relevant suppliers and confirm basic fit before requesting offers.
- 03
Comparable quotations
Collect offers on a consistent basis and surface technical or commercial gaps.
- 04
Decision support
Give you a structured view so your team can approve the next step.
FAQs
Common questions about pipe fittings & flanges.
Can you match an existing pipe or flange?
Yes, if you provide dimensions, photos, markings or a sample drawing. We can help identify the likely standard, but the final match should be confirmed against measured dimensions before ordering.
Do you distinguish between 304 and 316 stainless steel?
Yes. We treat them as separate material requirements and ask suppliers to confirm grade through marking and, where required, mill certificates. They are not interchangeable for every environment.
Can you source small quantities?
Small orders are possible, but supplier minimum order quantities, setup costs and freight can make them uneconomic. We will confirm what is practical for the specific item.
Do you offer custom fabrication?
We can coordinate custom spools, manifolds and fabricated assemblies where drawings and a clear inspection scope are available. Feasibility depends on the supplier and the specification.
What should an RFQ include for flanges?
Include size, pressure class, facing, material, standard, bore or schedule, quantity and any marking or certificate requirements. A sketch or photo of the mating part is useful.
Next step
Need to source pipe fittings & flanges from China?
Send the product type, specification and quantity. A short description is enough to start; a drawing or data sheet helps us ask better questions.