Steel Pipe Supplier
When you need steel pipe for construction, structural fabrication, machinery, fluid transfer, scaffolding, greenhouse frames, industrial piping or project supply, you can send material, standard, pipe type, outside diameter, wall thickness, length, surface treatment and destination details. Bao Steel (Qingdao) Co., Ltd. helps you check carbon steel pipe, galvanized pipe, stainless steel pipe, square tube, rectangular tube and supplementary ductile iron pipe options before quotation.
Choose the Steel Pipe Type You Need
Your quotation will be more accurate when the pipe type is clear from the beginning. Carbon steel pipe, galvanized steel pipe, stainless steel pipe, square / rectangular tube and ductile iron pipe follow different standards, surface requirements, processing methods and packing details.
Carbon Steel Pipe
You can request seamless pipe, ERW pipe, welded pipe, API 5L, ASTM A106, ASTM A53, Q235, Q355 and structural pipe options.
View Carbon Steel Pipe →Galvanized Steel Pipe
You can check hot-dip galvanized pipe, pre-galvanized pipe, galvanized round pipe, square tube and rectangular tube for outdoor use.
View Galvanized Pipe →Stainless Steel Pipe
You can source 304, 316, 316L, welded stainless pipe, seamless stainless pipe, decorative tube and industrial stainless pipe.
View Stainless Pipe →Square / Rectangular Tube
You can use square and rectangular tube for frames, racks, machinery bases, structures, greenhouse systems and fabrication projects.
Send Tube Specs →Ductile Iron Pipe
You can send DN size, pressure class, joint type, lining and coating details when your project includes municipal pipe supply.
View Ductile Iron Pipe →Steel Pipe Products We Supply
This page works as the main steel pipe category entrance. You can enter a specific pipe page for detailed product options, or send one combined inquiry when your order includes multiple pipe types, standards or sizes.
Carbon Steel Pipe
Carbon steel pipe is commonly used for structural applications, fluid transfer, fabrication, machinery, construction and industrial projects.
- Seamless pipe, ERW pipe, welded pipe, LSAW pipe and SSAW pipe
- API 5L, ASTM A106, ASTM A53, ASTM A500, Q235, Q355, S235 and S355
- Round pipe, structural pipe, square tube and rectangular tube by requirement
- Cutting, beveling, threading, marking and export packing can be discussed
Galvanized Steel Pipe
Galvanized steel pipe is selected when your order needs zinc-coated surface protection for construction, outdoor structures or repeated resale supply.
- Hot-dip galvanized pipe, pre-galvanized pipe and galvanized steel tube
- Round pipe, square tube and rectangular tube available by order
- Used for scaffolding, fence, greenhouse, handrail and outdoor frames
- Zinc surface, pipe length, pipe end and bundle packing should be confirmed
Stainless Steel Pipe
Stainless steel pipe is selected when you need corrosion resistance, cleaner surface, visible finish or industrial piping compatibility.
- 304, 304L, 316, 316L, 201, 430 and other stainless grades by requirement
- Welded stainless pipe, seamless stainless pipe and decorative stainless tube
- Polished, brushed, satin, mirror, pickled or industrial finish can be discussed
- Surface protection and packing should be confirmed before shipment
Square / Rectangular Steel Tube
Square and rectangular steel tubes are widely used for structures, frames, machinery, racks, greenhouse systems and welded fabrication.
- Carbon steel, galvanized steel and stainless steel tube options
- Used for machinery frames, supports, racks, structures and construction parts
- Side size, wall thickness, straightness and length tolerance should be confirmed
- Cut-to-length, bundling, labeling and export packing can be arranged by order
Seamless & Welded Pipe
Seamless and welded pipe selection depends on pressure requirement, application, standard, cost target and project specification.
- Seamless pipe is often selected for pressure-related or mechanical use
- Welded pipe and ERW pipe are widely used for structural and general pipe applications
- API, ASTM, EN, JIS and GB standards can be discussed by project
- Inspection documents and pipe marking should be confirmed before shipment
Ductile Iron Pipe
Ductile iron pipe is treated as a supplementary pipe category for water supply, drainage and municipal infrastructure projects.
- Socket pipe, flanged pipe and cement lined pipe can be discussed
- Project drawings, DN size, pressure class and joint type should be provided
- Lining, external coating, accessories and inspection documents need confirmation
- This product is positioned as supplementary project supply, not the main steel product category
Processing Support
Processing details should be confirmed before final quotation when your order requires fixed length, pipe end preparation or surface treatment.
- Cutting, threading, beveling, grooving, drilling and marking can be discussed
- Painting, oiling, galvanizing, polishing and protective film depend on material type
- Bundle packing, plastic caps, tags and shipping marks should match destination needs
- Inspection and loading photos can be arranged according to order requirements
Project Pipe Supply
For project buyers, you can send a drawing, BOQ or item list so we can review pipe grade, size, standard, coating, packing and shipment plan together.
- Suitable for construction, infrastructure, fabrication and industrial installation orders
- Mixed sizes, mixed product types and container loading plans can be discussed
- Pipe marking, bundle labels and shipment records help reduce receiving issues
- Destination port and trade term should be provided for quotation review
Common Standards and Grades for Steel Pipe Orders
You can send your required standard directly if your project already specifies one. For resale or general fabrication orders, material, application and destination market should be checked before choosing the pipe standard.
Carbon Steel Pipe
API 5L, ASTM A53, ASTM A106, ASTM A500, Q235, Q355, S235 and S355 are commonly requested for line pipe, seamless pipe, welded pipe and structural tube.
Galvanized Steel Pipe
ASTM A53, ASTM A500, EN 10255, EN 10219, BS 1387, Q235 and Q355 can be discussed according to pipe type, coating route and market requirement.
Stainless Steel Pipe
304, 304L, 316, 316L, ASTM A312, ASTM A269 and ASTM A554 are commonly used for industrial, decorative and corrosion-resistant pipe orders.
Ductile Iron Pipe
ISO 2531, EN 545, EN 598 and AWWA C151 can be discussed when your municipal project includes ductile iron pipe as supplementary pipe supply.
Steel Pipe Stock, Processing, Inspection and Export Packing
When you compare steel pipe suppliers, you need to confirm stock condition, pipe type, surface treatment, pipe end, processing capability, packing method and shipment readiness before placing an order.
Steel Pipe Warehouse Stock
You can review pipe bundles, OD range, surface condition, labels and warehouse handling before quotation.
Pipe Processing Capability
You can discuss cutting, threading, beveling, grooving, drilling and end preparation according to your installation needs.
Size and Surface Inspection
You can confirm OD, wall thickness, straightness, surface condition, pipe labels, MTC and heat number traceability before shipment.
Export Pipe Packing
You can request bundle packing, steel straps, pipe caps, waterproof protection, labels, shipping marks and loading photos.
Round Pipe, Square Tube and Rectangular Tube Selection
Pipe shape affects application, load direction, fabrication method, packing density and final installation. You should confirm pipe shape, wall thickness, length tolerance and surface treatment before quotation.
Round Steel Pipe
You can choose round pipe for fluid transfer, scaffolding, handrails, construction, fencing, mechanical parts and general pipe applications.
Square Steel Tube
You can use square tube for frames, racks, supports, greenhouse structures, welded structures and fabrication projects.
Rectangular Steel Tube
You can choose rectangular tube for machinery bases, structural supports, furniture frames, construction parts and load-bearing fabrication.
Seamless vs Welded
You can select seamless pipe for pressure-related or mechanical requirements, while welded pipe is widely used for structural and general applications.
What You Should Confirm Before Steel Pipe Quotation
Steel pipe quotation should not be based only on product name. Material, standard, pipe type, outside diameter, wall thickness, length, surface treatment, end finish, packing and inspection documents all affect price and delivery feasibility.
Core Specification Details
- MaterialCarbon steel, galvanized steel, stainless steel or ductile iron pipe according to application
- Pipe TypeSeamless, welded, ERW, LSAW, SSAW, round pipe, square tube or rectangular tube
- StandardASTM, API, EN, JIS, GB or project-specified pipe standard
- SizeOutside diameter, wall thickness, schedule, length, tolerance and pipe shape requirement
- End FinishPlain end, beveled end, threaded end, grooved end, capped end or buyer-specified end finish
- SurfaceBlack, galvanized, painted, oiled, polished, brushed, pickled or coated surface requirement
Processing and Export Details
- ProcessingCutting, threading, beveling, grooving, drilling, marking, polishing or coating requirement
- ApplicationConstruction, structure, machinery, water supply, fluid transport, scaffolding, greenhouse or fabrication
- PackingBundle packing, steel straps, plastic caps, waterproof wrapping, labels and shipping marks
- DocumentsMTC, heat number, packing list, commercial invoice, certificate of origin and inspection support
- InspectionSize check, wall thickness check, surface check, straightness check and packing inspection
- DestinationDestination country or port, preferred trade term and shipment schedule
Pipe Cutting, Surface Treatment, Inspection and Export Loading
Processing and packing details affect installation, receiving inspection, storage and final project delivery. You can confirm pipe end treatment, surface condition, inspection records, bundle protection and loading photos before shipment.
Cutting, Threading and Beveling
You can request fixed-length cutting, threaded ends, beveled ends, grooved ends or other pipe end preparation.
Surface Treatment
You can confirm black surface, galvanized surface, painted surface, anti-rust oiling, polished finish or protective film.
OD and Wall Thickness Check
You can confirm OD, wall thickness, length, straightness, surface condition, labels and document consistency before shipment.
Bundle Loading and Shipment
You can review bundle condition, loading method, pipe protection, container loading photos and shipment marks.
Common Applications of Steel Pipe
Application details help confirm pipe material, standard, coating, end finish and packing method. Different end uses require different pipe routes and inspection focus.
Construction and Structure
You can use steel pipe for structural frames, supports, scaffolding, columns, trusses, construction parts and building components.
Fluid and Industrial Piping
You can request steel pipe for water, gas, steam, oil, industrial fluid transfer and selected pressure-related applications.
Machinery and Fabrication
You can use steel pipe and tube for machinery frames, equipment parts, guards, brackets, racks and fabricated structures.
Fence, Greenhouse and Outdoor Use
You can choose galvanized pipe for fence posts, greenhouse frames, handrails, agricultural structures and outdoor support systems.
Specification Review, Processing, Documents and Export Packing Support
Before final order, you can confirm pipe specification, material grade, standard, processing, inspection documents, packing method and shipment details to reduce receiving disputes and project delays.
Specification Review
You can send material, standard, OD, wall thickness, length, pipe type, application and destination for quotation review.
Processing Support
You can discuss cutting, threading, beveling, grooving, drilling, coating, painting, polishing and marking according to order details.
Quality Documents
You can request MTC, heat number, packing list, commercial invoice, certificate of origin and inspection documents by order.
Export Packing
You can confirm bundle packing, steel straps, plastic caps, waterproof protection, labels, shipping marks and loading photos.
Common Questions from Steel Pipe Buyers
What information should I send for a steel pipe quotation?
You should send material, pipe type, standard, outside diameter, wall thickness, schedule, length, surface treatment, end finish, quantity, packing request, destination and document requirements.
Can you supply carbon steel pipe, galvanized pipe and stainless pipe together?
Yes. Mixed steel pipe inquiries can be reviewed together, but each item should have clear material, standard, size, surface requirement, quantity and packing details.
Can you support seamless pipe, welded pipe and ERW pipe?
Yes. Seamless pipe, welded pipe, ERW pipe, LSAW pipe, SSAW pipe, round pipe, square tube and rectangular tube can be discussed according to application and standard.
Can you support pipe cutting, threading, beveling or grooving?
Cutting, threading, beveling, grooving, drilling, marking, painting and selected surface treatment requirements can be checked according to order quantity and pipe specification.
Can you provide MTC, packing photos and loading photos?
Yes. MTC, heat number, packing list, commercial invoice, certificate of origin, inspection documents, packing photos and loading photos can be arranged according to order requirements.
Related Steel Pipe and Steel Product Pages
You can enter the specific pipe page when your inquiry is already clear, or review related plate, coil, structural steel, quality control and packing support pages for project sourcing.
Send Your Steel Pipe Inquiry
Send pipe material, standard, pipe type, outside diameter, wall thickness, length, surface treatment, end finish, quantity, packing request and destination details. We will check availability, processing feasibility, packing method, documents and quotation details.
Direct Contact
For Faster Quotation, Please Include
- ✓Material: carbon steel, galvanized steel, stainless steel or ductile iron pipe.
- ✓Pipe type: seamless, welded, ERW, round pipe, square tube or rectangular tube.
- ✓Size: outside diameter, wall thickness, schedule, length, tolerance and end finish.
- ✓Surface treatment, processing, packing, MTC, inspection, destination and shipment schedule.
Document Support
- MTC
- Heat number
- Packing list
- Commercial invoice
- Certificate of origin
- Inspection report
- Loading photos
- Shipping marks
Steel Inquiry Form
Send this form for steel pipe, carbon steel pipe, galvanized steel pipe, stainless steel pipe, square tube, rectangular tube and other steel product inquiries.
