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High Quality ASTM A333 Gr.6 Alloy Steel Pipe

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High Quality ASTM A333 Gr.6 Alloy Steel Pipe

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Payment Type: L/C,T/T,D/P
Min. Order: 1 Bag/Bags

Description

Product Attributes

Brand: JIADE GROUP

Section Shape: Round

Place Of Origin: China

Standards: API, ASTM, BS, DIN, GB, JIS, API 5CT, ANSI A182-2001, BS 1139, DIN 1626, GB 13296-2007, JIS C8305-1999

Grades: 10#-45#, 10Cr9Mo1VNb, 10MoWVNb, 15NiCuMoNb5, 16Mn, API J55-API P110, Cr-Mo alloy, CrNi alloy, Mn-V alloy, Mo, Q195-Q345, ST35-ST52, STB35-STB42, STPA22-STPA26, STPG42, 10#, 10Cr9Mo1VNb, 10MoWVNb, 15NiCuMoNb5, 16Mn, API J55, 10CrMo910, 1Cr13Mn9Ni1N, 09Mn2V,

Materials: 10#-45#, 10Cr9Mo1VNb, 10MoWVNb, 15NiCuMoNb5, 16Mn, API J55-API P110, Cr-Mo alloy, CrNi alloy, Mn-V alloy, Mo, Q195-Q345, ST35-ST52

Outer Diameter: 10-273 mm

Thickness: 0.5 - 15 mm

Length: 5.8m-12m fixed, 2-12m random or as required

Certifications: API

Technique: ERW

Surface Treatment: Black, galvanized and others

Special Pipe: Thick wall pipe

Application: Structure pipe

Packaging & Delivery

Selling Units:	Bag/Bags

Supply Ability & Additional Information

Payment Type: L/C,T/T,D/P

The entire processing flow of alloy pipes, from raw materials to finished products and transportation.

04:08

Product Description

What Is ASTM A333 Grade 6 Alloy Steel Pipe？

A “High Quality” ASTM A333 Grade 6 Alloy Steel Pipe meets or exceeds the standard's requirements while incorporating rigorous controls for critical applications, especially low-temperature services (down to -45°F / -43°C). It is a commonly used grade in our Alloy Steel Material range and is widely applied in industries such as petroleum and chemicals. Below are the essential quality markers:

Core Requirements of ASTM A333 Gr.6

Specification

Material Type：Low-alloy steel with 0.40–0.70% Nickel (enhances cryogenic toughness).

Manufacturing：Seamless (SMLS) or Electric Welded (ERW/CW) with full heat treatment.

Key Applications：LNG pipelines, cryogenic storage, ammonia systems, arctic oil/gas infrastructure.

What Defines "High Quality"?

Seamless Preferred: Reduced defect risk vs. welded pipes.

Welded Pipes: Must undergo 100% radiography (RT) or ultrasonic testing (UT) to validate weld integrity.

Heat Treatment: Normalized or stress-relieved to ensure uniform microstructure.

Superior Impact Toughness

Charpy V-Notch Testing: Mandatory at -50°F (-45°C).

Acceptance Criteria: Minimum 13 ft-lb (18 J) average energy absorption per specimen.

Batch Testing: Strict traceability – test coupons from each heat lot.

Precision Dimensional Control

Tolerances: Conforms to ASME B36.10M (e.g., OD ±0.75%, WT +12.5%/-10%).

Straightness & Ovality: ≤0.2% deviation over length; ovality ≤1.5% of OD.

Flawless Surface Quality

Visual Inspection: No cracks, seams, laps, or scabs.

Internal Cleanliness: Scale-free bore (critical for cryogenic gas/liquids).

Comprehensive Certification

Mill Test Reports (MTRs): Includes:

Chemistry (C≤0.30%, Mn 0.29–1.06%, Ni 0.40–0.70%).

Tensile/yield strength (≥50ksi yield, ≥70ksi tensile).

Impact test results, hydrostatic test pressure, NDE reports.

Quality Assurance Protocols

NDE (Non-Destructive Examination):

Ultrasonic Testing (UT): Detects subsurface flaws.

Radiographic Testing (RT): For weld inspection (if applicable).

Eddy Current/Hydrostatic Testing: Verifies pressure integrity.

Third-Party Inspection: Independent validation (e.g., SGS, BV, Lloyds).

PMI (Positive Material Identification): XRF gun verification of chemistry.

Supplier Red Flags to Avoid

No impact test reports for the specific batch.

MTRs lacking traceability to heat/pipe numbers.

Inconsistent wall thickness or surface pitting.

Non-compliant nickel content (<0.40%).

Applications Demanding High Quality

LNG Transfer Lines: -260°F (-162°C) methane service.

Ammonia Refrigeration Plants: -28°F (-33°C) corrosive environments.

Offshore Platforms: Sub-zero Arctic conditions.

Power Plants: Chilled water systems.

Key Takeaway:

High-quality ASTM A333 Gr.6 pipes prioritize impact toughness, material purity, and defect-free construction – validated through extensive testing and documentation. Always demand:

Batch-specific Charpy test reports.

Full NDE coverage (UT/RT).

Third-party certified MTRs.

For critical projects, specify Supplementary Requirements in your purchase order (e.g., S1–S7 in ASTM A333), such as enhanced UT or additional hydrostatic testing.

Tests we apply to the Alloy Steel Pipe:

1. Chemical composition analysis

2. Mechanical properties (tensile strength, yield strength, elongation, hardness)

3. Technological test (flattening test, flaring test, bending test, hydraulic pressure test)

4. Surface quality detection

5. Eddy-current examination

6. Visual test

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