Hot Rolled Steel Pipe Round Square Rectangular Q345b Q355b Q235B Seamless Steel

Name: Hot Rolled Steel Pipe Round Square Rectangular Q345b Q355b Q235B Seamless Steel
Brand: Jinan Zunkai Materials Co., Ltd.
SKU: 1984365311

Shandong, ChinaJinan Zunkai Materials Co., Ltd.

US$550.00

5-49 Tons

US$520.00

50-499 Tons

US$500.00

500+ Tons

Product specifications

customized

Sample price:US$50.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

Contact Supplier

Warranty

Contact Supplier

Model NO.

Q235/Q355

Type

Seamless

Technique

Cold Drawn

Material

Carbon Steel

Surface Treatment

Oiled

Usage

Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose

Section Shape

Round

Name

Seamless Steel Pipe

Grade

Q195/Q235/Q345/S235jr/S275jr/S355jr

Keyword

Carbon Seamless Tubes

Standrad

ASTM JIS GB BS

Surface

Black

Standard

Oiled or Non-Oiled

Slightly Oiled

Alloy or Not

Non-Alloy

Invoicing

by Actual Weight

Sample

Avalible

Tolerance

±1%

Certificate

CE, ISO9001

MOQ

3 Ton

Delivery Time

Within 7 Days

Price Term

CIF CFR Fob EXW

Transport Package

Sea Worth Packing

Specification

Customized

Trademark

Origin

China, Shandong

HS Code

7304399000

Production Capacity

500000tons Each Year

Key features

High Strength Seamless Design: No welds ensure higher overall strength and fatigue resistance for high-pressure scenarios.

Wide Material Selection: Available in Carbon Steel, Alloy Steel, and Stainless Steel (304/316L) for diverse environments.

Multiple Surface Treatments: Options include Oiled, Black Painted, Galvanized, and PE/FBE anti-corrosion coatings.

Flexible Customization: Customizable length, grade, and surface treatment; special sizes require mold production.

Versatile Industrial Applications: Suitable for oil/gas pipelines, boilers, hydraulic systems, construction, and machinery.

Strict Quality Control: Ensured via UT/ET non-destructive testing and water pressure tests without leakage.

Fast Delivery Time: Standard orders delivered within 7 days; peak season lead time within 15 workdays.

Company profile

High Repeat Buyers ChoiceExhibition ExperienceOverseas WarehouseFlexible Customization

Jinan Zunkai Materials Co., Ltd.

Shandong, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 8 Years CertifiedNearest Port: Tianjin PortAverage Response Time: ≤1.73h

About Our Factory & Business Background

AddressNo. 15 Lanxiang Road, Tianqiao District, Jinan, Shandong, China

Plant Area2356 square meters

Number of Employees50

Registered Capital10,000,000 RMB

Terms of PaymentLC, T/T, D/P, PayPal, Western Union, Small-amount payment

International Commercial Terms(Incoterms)FOB, CIF, CFR, EXW

Average Lead TimePeak Season Lead Time: within 15 workdays Off Season Lead Time: within 15 workdays

Minimum Order Quantity25 Tons

Supply Chain Partners5

Our Production Capability & Technical Expertise

Main ProductsRoofing Sheet, Galvanized Steel, Galvalume Steel, Steel Plate, PPGI, H Beam, Angle Steel, Stainless Steel, Hot Steel Coil, Cold Steel Coil, Silicon Steel

R&D Engineers2 people

Our Industry Experience & Global Business Record

Year of Establishment2016-01-20

Main MarketsSoutheast Asia/ Mideast

Repeat Buyers Choice50%~80%

Number of Foreign Trading Staff39

Overseas Agent/BranchYes

New Products Launched in Last yearNo

Our Certifications, Standards & Industry Recognition

Product CertificationCE, RoHS

Cooperated with Fortune 500No

Product Q&A

Q:What is the difference between seamless pipes and welded pipes?

Structure: Seamless pipes have no welds, and welded pipes have longitudinal or spiral welds; Strength: Seamless pipes have higher overall strength and are suitable for high-pressure scenarios (such as boilers and hydraulic systems); Cost: The production process of seamless pipes is complex, and the price is 10%-30% higher than that of welded pipes.

Q:How to choose the material of seamless pipe?

General environment: choose Q235 or 20# carbon steel (low cost, easy to process); Corrosive environment: choose 304/316L stainless steel or galvanized seamless pipe; High temperature and high pressure: choose 15CrMo, 12Cr1MoV and other alloy pipes (specific temperature and pressure parameters must be provided).

Q:How to detect the quality of seamless pipes?

Appearance: no cracks, folds, or scars on the surface, and uniform wall thickness; Non-destructive testing: ultrasonic (UT) and eddy current (ET) detection of internal defects; Pressure test: water pressure test (such as water pressure 10MPa, pressure maintenance for 5 minutes without leakage).

Q:What are the main applications of seamless steel pipes?

Used for fluid transportation (water, oil, gas), high-pressure scenarios (boilers, hydraulic systems), machinery manufacturing (drive shafts, cylinder tubes), construction (supporting columns, pile foundations), and chemical/petroleum industries (corrosive medium transport, oil extraction).

Q:What surface treatments are available for seamless pipes?

Options include Bared, Black Painted (varnish coating), Galvanized, Oiled, and anti-corrosion coatings such as PE, 3PE, and FBE.