QUESTIONS & ANSWERS
Cast Bronze Union FAQ: Specifications, Ordering and Support Questions
This FAQ covers the most common questions buyers and procurement teams ask about the Cast Bronze Union manufactured by Langfang Pannext Pipe Fitting Co., Ltd. Topics include material composition, pressure class, available sizes, UL certification, step-by-step quality controls, packaging, payment terms, sample availability, and product guarantee. Every answer is drawn directly from confirmed product documentation.
Frequently Asked Questions: Cast Bronze Union
Langfang Pannext Pipe Fitting Co., Ltd. manufactures a 125 LBS threaded union for water, sewage, natural gas, and industrial fluid piping. The answers below address the specifications, certifications, quality process, and ordering details that buyers most commonly ask about.
What material is used in this fitting?
The union is cast from bronze conforming to ASTM B62 (UNS Alloy C83600) and ASTM B824 C89633. The alloy delivers corrosion resistance, good wear resistance, and a smooth, crack-free surface finish.
What pressure class and dimensional standards apply?
The fitting is rated Class 125 LBS. Fitting dimensions conform to ASME B16.15 Class 125, and threads are cut to the NPT standard ASME B1.20.1.
What size range is available?
Twelve nominal pipe sizes are available, from 1/8" to 4":
| Item No. | Size (inch) | Approx. Weight (g) |
|---|---|---|
| UNI01 | 1/8 | 72.7 |
| UNI02 | 1/4 | 113.8 |
| UNI03 | 3/8 | 165 |
| UNI05 | 1/2 | 214 |
| UNI07 | 3/4 | 320 |
| UNI10 | 1 | 467 |
| UNI12 | 1-1/4 | 717 |
| UNI15 | 1-1/2 | 910 |
| UNI20 | 2 | 1,390 |
| UNI25 | 2-1/2 | 2,328.3 |
| UNI30 | 3 | 3,067.5 |
| UNI40 | 4 | 5,442.5 |
Per-bag quantities vary by size: most sizes up to 2" ship 5 pieces per inner bag; sizes 2-1/2" and above ship 1 piece per inner bag inside 5-layer corrugated master cartons.
Does the fitting carry any certifications?
The product holds UL Certification and conforms to specification A-A-59617.
What quality-control steps are applied during production?
Every union passes through a seven-stage inspection process:
- Raw material incoming check — composition verified before use.
- Molding control — melt temperature and chemical composition monitored.
- Post-casting appearance inspection — conducted after rotary cooling.
- Grinding and surface check — flatness and finish verified.
- Threading in-process check — appearance and thread dimensions gauged.
- 100% water pressure test — each piece is tested before entering the warehouse.
- Final packaging QC — packed goods verified against the purchase order.
Minimum mechanical properties: tensile strength 20.0 kg/mm² (minimum) and elongation 20% (minimum).
What are the payment and delivery terms?
Accepted payment methods are TT or L/C: 30% advance payment, with the 70% balance due before shipment. Delivery lead time is 35 days from receipt of the advance payment.
Are samples available before placing a bulk order?
Yes. Free samples can be requested to evaluate fit, finish, and thread quality before committing to a production order.
What product guarantee is offered?
A minimum 1-year guarantee is provided.
Is Langfang Pannext Pipe Fitting Co., Ltd. a manufacturer or a trading company?
Langfang Pannext Pipe Fitting Co., Ltd. is a manufacturer with more than 30 years of history in the casting field. Monthly production capacity for this product line is 50 tons. The factory is located in Langfang City, Hebei Province, China.
For current pricing, minimum order quantities, and export documentation, contact Langfang Pannext Pipe Fitting Co., Ltd. directly.
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Langfang Pannext Pipe Fitting Co., Ltd.
Langfang Pannext Pipe Fitting Co., Ltd. is a Sino-US joint venture, which is specialized in the production of malleable iron pipe fittings and bronze pipe fittings. PanNext has been founded in 1993 with over 366,000 square feet of facility area. It is located in Langfang City, Hebei Province - known as the Pearl on the Beijing-Tianjin Corridor,which is very convenient by land, sea and air transportation. With +30years’ R&D experiences,there are more than 350 employees working in PanNext.…
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Post time: Oct-29-2026
