20# 45# Q345B ASTM A106 GB/T 8163

Seamless Carbon Steel Pipe

Source carbon steel seamless pipe to ASTM A106, A53, API 5L, or an agreed project standard with OD, wall, ends, testing, MTC, and export packing confirmed before quotation.

MOQ: Typically 1 container
Lead time: 7-21 working days after confirmation
Origin: China
Monthly supply: 5,000+ metric tons per month
Standards: ASTM A106, GB/T 8163
Surface: Bare or light-oiled, Black painted, External coating or internal lining by project specification
Certificates: EN 10204 3.1 / MTC
Packing: Pipe and hollow-section lots are bundled by size and heat or lot where traceabi…

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PRODUCT TECHNICAL SPECIFICATION PLATE ORDER-SPECIFIC DATA

TECHNICAL METRICS

Material: Carbon Steel
Form: Pipe
Primary Grade: 20#
Primary Standard: ASTM A106

LOGISTICS & DISPATCH

MOQ: Typically 1 container
Lead time: 7-21 working days after confirmation
Origin: China
Monthly supply: 5,000+ metric tons per month

Full specifications

Full specifications
Property	Value
Manufacturing route	Hot-finished or cold-drawn seamless, as ordered
Common standards	ASTM A106, ASTM A53, API 5L, or project-specific boiler tube standard
Dimensions	OD x wall thickness or NPS x schedule; fixed or random length
Ends and testing	PE or BE; hydrostatic and NDT scope per standard and PO
Outer Diameter	Φ6-630mm
Use	Fluid, boiler, structural and pressure service

Overview

Carbon steel seamless pipe is specified for pressure, mechanical, boiler, and line-service packages where the project standard requires a seamless manufacturing route. Buyers should separate ASTM A106/A53, API 5L, and boiler-tube requirements and state the service temperature, pressure basis, schedule, and test scope rather than ordering only by a generic pipe name. For a controlled quotation, the RFQ must identify the governing standard and grade, outside diameter or section size, wall thickness, length, end finish, quantity, coating, service, and destination port. The commercial review checks that the manufacturing route matches the intended duty before price release; welded, seamless, structural, line-pipe,…

Applications

Process and utility piping
Boiler and heat-transfer tubing when the ordered standard permits
Oil and gas line or mechanical service requiring a seamless route

Surface options

Bare or light-oiled
Black painted
External coating or internal lining by project specification

Processing & form

Fixed-length cutting
Plain or beveled ends
Threading and end protection when specified
Hydrostatic and NDT scope by standard or PO

RFQ documents & delivery

Packing, MTC, and inspection path — include them in your RFQ for an actionable quote.

Packing & delivery

Order-specific packing

Pipe and hollow-section lots are bundled by size and heat or lot where traceability is required. Export packing can include steel straps, waterproof wrapping, lifting points, bevel or thread protectors, end caps, and durable shipping marks. Bundle weight, loose-loading restrictions, container limits, discharge method, destination port, and any break-bulk lashing plan are confirmed before loading.

Quality assurance

Documents as ordered

Inspection is agreed against the purchase order, governing product standard, and any approved inspection and test plan. The review can cover grade and heat identity, dimensions, wall thickness, end preparation, visual condition, coating, hydrostatic testing, and NDT records where applicable. EN 10204 3.1 documentation and third-party witness points must be requested before production is released.

Supply confidence

Stock, inspection, and product uses

Fixed delivery proof plus this product’s applications — confirm stock, inspection, and end use before RFQ.

Steel bundles staged by lot in the warehouse

Warehouse & staged stock

Strapped coils and plates staged by lot so grade, thickness, and destination port can be matched quickly for shipment.

Factory capability Ask stock & lead time

Buyer verifying thickness and specs on site

Buyer visits & inspection

Overseas buyers and third-party inspectors are welcome to verify specs, heat numbers, and packing. SGS/BV support available.

Quality & standards Arrange inspection

Steel used in oil, gas, and pipeline work

Typical applications for this product

Typical uses for this product: Process and utility piping; Boiler and heat-transfer tubing when the ordered standard permits; Oil and gas line or mechanical service requiring a seamless route. Share your end use, environment, and packing needs in the RFQ.

View oil & gas Quote for this use case

FAQ

What should an RFQ for Seamless Carbon Steel Pipe include?

State standard, grade, OD, wall or schedule, length, ends, service, testing, quantity, coating, packing, and port. A complete line-item specification is required before manufacturing route, availability, inspection, and packing can be confirmed.

What quality documents are available for Seamless Carbon Steel Pipe?

The ordered document pack can include mill certificates, lot or heat identity, dimensional and visual inspection records, and product-specific test reports. Third-party inspection must be agreed before production or stock allocation.

How is Seamless Carbon Steel Pipe packed for export?

Packing is selected from the product form, unit weight, handling method, destination climate, container or break-bulk limits, and discharge plan. Confirm the destination port and any storage constraints on the RFQ.

Request a Quote

Send the complete Seamless Carbon Steel Pipe specification, quantity, inspection scope, packing preference, and destination port for review.

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Web RFQ: formal quote + document path
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