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Experience first-hand the meticulousness and dedication that goes into creating each of our high-quality pipe flanges and butt-weld pipe fittings.

Wuliyao Industry Zone, Yanshan County, Hebei Province, China.



At JS FITTINGS, quality is not an act, it’s a habit. As a leading manufacturer in the industry, we understand the critical role that quality plays in each and every product we produce. This is why we have implemented a comprehensive Quality Control (QC) system that permeates every aspect of our operations.

Rigorous Inspection Process

Our QC process begins from the moment raw materials arrive at our facility. Each batch is thoroughly inspected to ensure it meets our high standards. From there, each stage of the production process involves rigorous checks and inspections to catch any potential issues early.

pipe fitting material
flange RF raised face testing

State-of-the-Art Equipment

We utilize state-of-the-art testing equipment to measure and analyze the physical and chemical properties of our products. This includes hardness testers, spectrometers, impact testing machines, and more. These tools allow us to ensure the consistency and reliability of our products.

testing equipment

Skilled QC Team

Our Quality Control team is composed of highly skilled and experienced professionals who are committed to maintaining our high-quality standards. They undergo regular training to stay up-to-date with the latest QC techniques and industry standards. We use state-of-the-art equipment and processes to ensure that every product meets our rigorous quality requirements. Our Quality Control team meticulously inspects each item prior to shipping, ensuring that the highest level of quality is maintained throughout the process. We also have an extensive network of suppliers who provide us with reliable materials so we can produce superior products for our customers. With a commitment to excellence and customer satisfaction, our Quality Control team goes the extra mile to guarantee that only the best products are delivered. Thank you for trusting us with your order! We appreciate your business. We look forward to serving you in the future.


Compliance with International Standards

Our products comply with various international quality standards such as ISO 9001, ASME, ASTM, and others. We also hold several certifications that demonstrate our commitment to quality.

pipe fittings
pipe flanges

ASME B16.9, ASME B 16.28,

ASME B16.49

ASME B16.5, ASME B16.47,

ASME B16.48

ASME B36.10, ASME B36.19


EN 10253

EN 1092, BS 10, DIN 2573, DIN 2631, etc.

EN 10220, EN 1127, BS EN 10216, etc


GOST 17375, GOST 30753, GOST 17376, GOST 17378, GOST 17379

GOST 33259, GOST 12820, GOST 12821

GOST 10704, GOST 10707, GOST 3262, etc.


JIS B2220

JIS 3452, JIS 3454, etc



Continuous Improvement

We believe in continuous improvement and regularly review and update our QC processes as part of our commitment to excellence. We also welcome feedback from our customers as it helps us to improve our products and services.

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Cangzhou, Hebei, China

Wuliyao Industry Zone, Yanshan County.