1. Material & Standards
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Material: Carbon Steel / Alloy Steel (API Grades)
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Standards: API 5CT / API 5B
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Thread Type: BTC (Buttress Thread Connection), Round Thread (STC, LTC, BTC)
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Application Standard: Oil & Gas Well Casing & Tubing
2. Key Specifications
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Size Range: 1.9" – 20" (OD 48.3mm – 508mm)
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Wall Thickness: According to API 5CT
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Grades Available: J55, K55, N80, L80, P110, Q125
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Thread Type: BTC (Buttress Thread), API 5B Round & Buttress
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Length: R1 (4.88–7.62m), R2 (7.62–10.36m), R3 (10.36–14.63m)
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Coating: Varnished, Black Painting, or Custom Anti-Corrosion Coating
3. Features & Benefits
✔ High Strength & Toughness – Designed for oilfield drilling and casing wells
✔ Reliable Thread Connection – API BTC thread provides excellent sealing & mechanical resistance
✔ Wide Grade Selection – Covers general & sour-service applications
✔ Corrosion Protection – Custom coating options extend service life
4. Applications
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Oil & Gas Well Casing
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Tubing for Petroleum & Natural Gas Extraction
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Deep-Well Drilling & Production
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Onshore & Offshore Oilfield Projects
5. Certifications
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API 5CT / API 5B Certified
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ISO 9001 / ISO 14001 / OHSAS 18001
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Third-Party Inspection (SGS, BV, TUV) Available
Frequently Asked Questions (FAQ)
1. Are you a manufacturer or trading company?
We are a manufacturer with our own factory located in Hebei, China.
2. What materials do you offer?
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Stainless Steel: 304, 304L, 316, 316L, 321, etc.
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Carbon Steel: ASTM A105, ASTM A350 LF2, Q235, Q345, etc.
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Alloy Steel: ASTM A182 F11, F22, F5, etc.
3. Which standards do your products comply with?
ASME B16.5, ANSI, ASTM, DIN, JIS, EN, GB — with third-party inspection available.
4. Do you support OEM/ODM customization?
Yes, we provide custom machining, coating, marking, and packaging based on your drawings.
5. What is your minimum order quantity (MOQ)?
MOQ is typically 1 piece for standard items; customized parts may vary.
6. Do you provide free samples?
Yes, free samples for standard sizes are available; buyers cover shipping cost.
7. What is your delivery time?
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In-stock: 3–5 working days
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Bulk/custom orders: 10–25 working days
8. How do you ensure product quality?
We perform full inspection: raw material verification, dimensional checks, pressure/leak tests, and surface finish inspection. Third-party testing is available upon request.
