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2英寸316不锈钢管 - ASTM A312无缝焊接管

快马钢铁有限公司
已认证 定制生产厂家 · 7 年 · 中国 China
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$2650 1-49 吨 基准价
$2535 50-99 吨 4.3% 优惠
$2475 ≥100 吨 6.6% 优惠
价格有效期:随行就市

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最小起订量: 1 吨

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商品小计 US$ 2,650.00
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产品详情

2英寸316不锈钢管技术规格

属性参数描述
产品名称2 Inch 316 Stainless Steel Pipe具有优异耐腐蚀性的奥氏体不锈钢管
材料牌号316 / EN 1.4401 / UNS S31600国际牌号对应
标准合规ASTM A312, ASTM A213, EN 10216-5符合主要国际标准
公称管径2 inch (DN50)标准管道规格
外径60.3 mm (2.375 inch)符合 ASME B36.19 的标准外径
壁厚Schedule 10S to Schedule 160范围:2.77 mm - 11.07 mm
碳 (C)≤0.08%用于保证强度的碳含量
铬 (Cr)16.0-18.0%提供耐腐蚀性
镍 (Ni)10.0-14.0%增强延展性和韧性
钼 (Mo)2.0-3.0%提高抗点蚀和缝隙腐蚀能力
抗拉强度≥515 MPa符合 ASTM A312 的最低抗拉强度
屈服强度≥205 MPa最低屈服强度
延伸率≥35%50mm 标距内的延展性
长度6 m or custom可提供标准长度和定制长度
表面处理Annealed and pickled, polished多种表面处理选项
应用Chemical processing, marine, food processing, pharmaceutical典型应用行业
认证EN 10204 3.1, ISO 9001, PED提供的质量认证
MOQ100 meters最小起订量

2英寸316不锈钢管 - ASTM A312无缝焊接管

2 英寸 316 不锈钢管是一种优质耐腐蚀管道解决方案,专为严苛的工业应用而设计。该管道材料由奥氏体铬镍钼合金制成,具有卓越的抗氯化物腐蚀性能、优异的机械强度和出色的焊接性。该产品非常适合化学加工厂、海洋环境、制药制造和食品加工设施,服务于需要在恶劣条件下可靠运行的行业。

什么是 2 英寸 316 不锈钢管?

2 英寸 316 不锈钢管是一种公称直径为 2 英寸(50.8 毫米)的耐腐蚀管状产品,由 316 级奥氏体不锈钢制成,含有 16-18% 铬、10-14% 镍和 2-3% 钼。与传统的 304 级材料相比,该合金成分在氯化物环境中具有更优异的抗点蚀和缝隙腐蚀性能。这些管道有无缝和焊接两种配置,符合 ASTM A312/A312M 标准,广泛应用于腐蚀性流体处理系统。

2 英寸 316 不锈钢管供应商

2 英寸 316 不锈钢管技术规格

该材料符合 ASTM A312/A312M-21 标准中关于无缝、焊接和重度冷加工奥氏体不锈钢管的规定。根据第 5 节要求,化学成分包括碳含量上限为 0.08%,铬含量范围为 16.0-18.0%,镍含量为 10.0-14.0%,钼含量为 2.0-3.0%。根据 ASTM A370 测试规程,力学性能显示最小抗拉强度为 515 MPa,最小屈服强度为 205 MPa,50mm 标距长度下的延伸率为 30%。可提供的标准壁厚包括 Schedule 5S、10S、40S 和 80S 配置,外径按 ASME B36.19M 尺寸标准保持为 60.3 mm。

2 inch 316 stainless steel pipe wholesale

制造工艺与质量控制

生产采用符合 ASTM A999 的无缝热挤压方法,或针对制造版本采用 TIG/等离子弧焊接技术。无缝管经过实心坯料的旋转穿孔,随后进行皮尔格轧制或冷拔,以达到最终尺寸,外径公差为 ±0.4mm。焊接版本采用自动熔焊,并在 1040-1120°C 下进行焊后热处理,以恢复热影响区的耐腐蚀性。每个生产批次均接受最低 6.9 MPa 压力的静水压测试、符合 ASTM E426 的涡流检测,以及确保符合规定公差的尺寸验证。

热处理要求

固溶退火处理在 1040°C 至 1150°C 的温度范围内进行,随后快速水淬以保持奥氏体显微组织并防止碳化物析出。该热处理工艺消除冷加工操作产生的残余应力,同时优化耐腐蚀性能。材料随附工厂测试证书,记录热处理参数和力学测试结果,符合 EN 10204 Type 3.1 认证标准。

表面处理选项

标准工厂表面处理提供适合工业应用的轧制或拉拔表面。增强型表面处理包括 2B 冷轧退火酸洗表面,Ra 值为 0.5 μm;2D 热轧退火酸洗表面;以及电解抛光表面,可实现 Ra 低于 0.25 μm,满足制药和食品加工要求。机械抛光至 180、240 或 320 目规格,满足美观和卫生应用需求。

应用行业和使用场景

化学加工设施使用这些管道处理硫酸、磷酸和有机溶剂,其中钼含量提供增强的耐点蚀性能。海洋应用包括海水淡化厂、海上平台和沿海基础设施,受益于优异的耐氯化物应力腐蚀开裂性能。制药制造系统采用电解抛光变体进行无菌流体输送,保持表面清洁度至最大 0.8 μm Ra。食品和饮料加工操作指定符合 3-A 标准的卫生级管道,用于乳制品、酿造和果汁生产线中的产品接触表面。

耐腐蚀性能

与304材料相比,添加2-3%的钼可显著提高在含氯化物环境中的耐局部腐蚀性能。Grade 316的耐点蚀当量数(PREN)按%Cr + 3.3(%Mo) + 16(%N)计算超过24,在海水和苦咸水应用中提供可靠的服务。材料在敏化后表现出优异的耐晶间腐蚀性能,在大多数使用条件下无需焊后热处理即可保持焊接组件的结构完整性。

温度使用范围

连续使用温度范围从液化气体处理所需的-196°C低温条件到氧化性气氛中高达870°C的高温。短时加热循环中,间歇暴露于925°C仍可接受。然而,在425-860°C之间长时间暴露可能导致碳化物析出,降低耐腐蚀性,因此该温度范围内焊接构件需选用低碳316L级别。

尺寸标准与公差

标称2英寸规格对应ASME B36.19M公制标称DN50的60.3 mm外径。Schedule 10S保持2.77 mm壁厚,提供2463 mm²的流通面积,而Schedule 40S规定3.91 mm壁厚,内部面积为2464 mm²。Schedule 80S厚壁变体采用5.54 mm厚度,将流通面积减小至2200 mm²。切割管材的长度公差在指定尺寸上保持±3.2 mm精度,根据ASTM A999要求,直线度偏差限制为总长度的0.15%。

焊接与制造指南

使用 ER316L 填充金属的钨极气体保护焊 (GTAW) 配合 12-15 L/min 的氩气保护气体流量,可获得最佳焊接质量。对于厚度低于 13 mm 的截面,无需预热。层间温度不应超过 150°C,以防止热影响区晶粒过度长大。焊后使用 8-20% 硝酸加 1-5% 氢氟酸溶液在 60°C 下酸洗 20-40 分钟,可恢复焊缝表面的钝化氧化铬膜。轨道焊接系统可实现可重复的熔深控制,这对于需要经验证焊接程序的制药和半导体应用至关重要。

机械连接方法

采用卡套式连接的压缩接头可在无焊接设备的情况下进行现场安装,适用于最大 DN50 的尺寸。符合 ASME B1.20.1 NPT 或 ISO 7-1 Rc 标准的螺纹连接适用于 2 MPa 以下的低压应用。使用 ASME B16.5 Class 150 或 300 锻造法兰配合缠绕垫片的法兰连接提供可拆卸接头,便于维护检修。压配合机械联轴器在建筑服务应用中具有安装速度优势,同时保持至 1.6 MPa 工作压力的无泄漏性能。

与替代材料的比较

由于含有 2-3% 的钼,Grade 316 相比 Type 304 表现出更优异的抗点蚀性能,在氯化物溶液中的临界点蚀温度高出 20-30°C。双相不锈钢 grade 2205 的最低屈服强度约为 450 MPa,是前者的两倍,但需要专门的焊接工艺,且价格比奥氏体 316 材料高出 30-40%。带腐蚀余量的碳钢初始成本较低,但在轻度腐蚀环境中要达到同等使用寿命,需要增加 3-6 mm 的壁厚。镍合金 625 在严苛的还原性酸工况下性能优于 316,但价格高出 300-400%,限制了其仅用于关键工况需求。

常见问题

最小起订量(MOQ)是多少?

Schedule 10S 和 40S 壁厚常规库存尺寸的标准最小起订量为 100 米。定制规格,包括非标长度、特殊热处理或认证材料测试报告,可能要求 500 米的最小起订量。可提供 1-2 米的样品长度用于资格测试和材料评估,并在 5-7 个工作日内加急交付。

你们提供材料测试证书吗?

所有发货均附有符合 EN 10204 Type 3.1 标准的综合钢厂测试证书,记录化学成分分析、力学性能测试结果、热处理参数和尺寸验证数据。证书包含炉号可追溯性、生产日期和制造工厂标识。对于需要独立验证材料合规性的关键应用,可安排通过 SGS、TÜV 或 Lloyd's Register 进行第三方检验服务。

典型的交货时间是多久?

标准 Schedule 10S 和 40S 配置的库存商品从区域配送中心发货,交货期为 3-5 个工作日。非库存尺寸需要 4-6 周的钢厂生产排程制造周期。定制规格包括特殊测试、认证要求或非标准表面处理,交货期延长至 8-10 周。加急生产选项可将交货期缩短 30-40%,针对紧急项目需求收取适用的加急费用。

能否按定制尺寸切割?

精密切割服务可满足从最小 100 mm 到最大 12 米的定制长度要求,使用砂轮切割或冷锯方法,公差为 ±1.5 mm。端部制备选项包括平切、用于焊接准备的 37.5° 坡口斜边,或按 ASME B1.20.1 规格的螺纹端。去毛刺和表面清洁处理确保交付时达到焊接就绪状态。相同规格数量超过 50 件可享受批量折扣。

获取 2 Inch 316 不锈钢管的竞争性报价

索取符合 ASTM A312 标准的 2 inch 316 不锈钢管的工厂直销价格,附带钢厂测试认证和质量保证文件。我们的技术销售团队提供应用工程支持、材料选择指导以及根据您的项目规格量身定制的定制加工解决方案。享受合并运输、灵活付款条件和专属客户管理,确保无缝采购体验。

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  • 针对材料缺陷和尺寸不合格提供全面保修

立即联系我们,24 小时内获取免费报价!我们的材料专家随时准备协助您处理技术规格、价格信息和交付排期,以满足您的项目时间要求。

2 inch 316 stainless steel pipe China

评分与评价

4.5
基于 10 条评价
5 6
4 3
3 1
2 0
1 0
用户
David Anderson
United States
2025-08-17
Acceptable Quality with Documentation Issues Resolved
Decent product for our 9-ton order of 2 inch Schedule 40S pipe, some initial documentation issues that were resolved. Material quality was good with proper ASTM A312 compliance and mechanical properties within specification range. However, original mill test certificates had incomplete heat treatment temperature data (showed range 1040-1150°C without specific value) and one certificate was missing hardness test results required by our quality plan. We contacted supplier and they provided corrected EN 10204 3.1 certificates within 48 hours showing actual annealing temperature of 1065°C and Brinell hardness of 152 HB. Material performed well in our fabrication trials with good weldability using standard GTAW procedures. Suggest implementing better quality control on documentation before shipment to avoid delays in customer receiving inspection. Overall acceptable for our brewing equipment project, but attention to paperwork details would improve customer experience and earn higher rating.
用户
Carlos Silva
Brazil
2025-08-26
Superior Material for Petrochemical Application
Long-term partnership for austenitic stainless piping. This is our 7th order over 14 months for various petrochemical projects totaling 78 tons. Their 2 inch 316 seamless pipe consistently demonstrates superior mechanical properties - latest batch showed 558 MPa tensile strength and 32% elongation, well above ASTM A312 minimums of 515 MPa and 30%. We use this material for organic solvent transfer lines operating at temperatures up to 180°C with pressure ratings to 3.5 MPa. Zero failures across 2.8 km of installed piping in our refinery expansion. Their technical team provided valuable input on material selection, recommending 316 over 316L for our high-temperature application to maintain strength. Delivery reliability is excellent with 4-6 week lead times maintained consistently. Looking forward to continued collaboration on upcoming ethanol plant project requiring 25 tons.
用户
Ahmed Al-Hassan
United Arab Emirates
2025-09-15
Decent Performance for Coastal Infrastructure Project
Reliable material for our 14-ton order of 2 inch 316 pipe used in Dubai coastal development seawater pumping station. We compared pricing from 5 suppliers across Middle East and Asia - their quote was competitive at mid-range while providing ASTM A312 compliance documentation. Pipe performed well in our 60-day saltwater immersion testing with pitting depth
用户
Wei Chen
Singapore
2025-10-02
Perfect Solution for Pharmaceutical Clean Room
We ordered 6 tons of 2 inch 316L electropolished pipe (Schedule 10S) for our pharmaceutical manufacturing client's WFI distribution system. Material certificates confirmed carbon content at 0.018% preventing carbide precipitation during orbital welding. Surface finish achieved Ra 0.19 μm after electropolishing, exceeding ASME BPE requirements for Class 1 systems. We performed bacterial endotoxin testing - results showed
用户
Chris Martin
Canada
2025-10-20
Solid Quality Pipe for Chemical Plant Expansion
Good experience with 10-ton order of 2 inch Schedule 40S welded pipe for our phosphoric acid transfer system. We compared quotes from 4 North American suppliers, and their delivered price was 18% lower including customs clearance. Quality was solid with proper post-weld heat treatment at 1080°C restoring corrosion resistance in weld seams. Hydrostatic test certificates showed 7.2 MPa pressure holding without leakage. However, delivery took 8 weeks instead of promised 6 weeks due to production scheduling delays at the mill. Supplier communicated proactively about the delay and offered 5% discount compensation. Overall, material quality justifies the wait for budget-conscious projects. 4 stars because lead time accuracy needs improvement, but would order again for non-urgent applications where cost savings matter.
用户
Robert Brown
United Kingdom
2025-11-06
Reliable Long-Term Partner for Stainless Piping
Long-term partner for 316 stainless steel pipe supply. This is our 11th order over the past 18 months totaling 95 tons. Consistency has been exceptional - every shipment meets ASTM A312 requirements with identical quality levels across different production batches. Their Schedule 40S pipe welds beautifully using ER316L filler with GTAW process, producing X-ray quality joints for our pressure vessel fabrications rated to 4 MPa. Technical support team helped us optimize our welding parameters to eliminate porosity issues we experienced with previous suppliers. Lead times remain stable at 5-7 days for stock items even during peak demand periods. Pricing is competitive and they accommodate our irregular order patterns without minimum quantity penalties. Looking forward to continued partnership for our pharmaceutical and chemical processing projects.
用户
William Taylor
Australia
2025-11-23
Premium Material for Offshore Platform Retrofit
We ordered 18 tons of 2 inch 316 seamless pipe (Schedule 80S, 5.54mm wall) for our offshore oil platform seawater cooling system upgrade. Quality assessment showed PREN value of 24.8, confirming superior pitting resistance for our harsh marine environment with 35,000 ppm chloride exposure. We conducted intergranular corrosion testing per ASTM A262 Practice E - zero sensitization detected in heat-affected zones. Surface was pickled and passivated with uniform oxide layer. Mill test reports documented solution annealing at 1065°C with rapid water quench. Mechanical properties exceeded minimums: 545 MPa tensile, 228 MPa yield. This material replaced failed 304 pipes that lasted only 3 years. Expecting 15+ year service life based on corrosion rate testing. Highly recommended for severe marine applications.
用户
Hans Mueller
Germany
2025-12-08
Good Value 316 Tubing for Food Processing Equipment
Good value for the price on our 5-ton order of electropolished 2 inch 316 pipe for dairy processing lines. We compared quotes from 6 suppliers across Europe and Asia, and their price was 12% lower than German mills while maintaining comparable quality with Ra surface finish of 0.22 μm meeting 3-A sanitary standards. The wall thickness tolerance was ±0.5mm instead of the tighter ±0.3mm we typically specify, requiring additional inspection time on our end. Overall, material performed well in our CIP cleaning validation tests with no contamination issues after 200 cycles. 4 stars because dimensional tolerances could be tighter for precision applications, but excellent value for standard food-grade requirements.
用户
James Wilson
United Kingdom
2025-12-23
Outstanding Service and Documentation Support
Excellent service experience from inquiry to delivery for our 12-ton order of 2 inch Schedule 10S seamless pipe. Communication: Technical team responded within 2 hours with detailed specification sheets and provided welding procedure recommendations for our sulfuric acid handling system. Delivery: Shipped in 3 days via air freight, arrived 2 days earlier than promised with real-time tracking updates. Packaging: Each 6-meter length individually wrapped in plastic film, bundled with steel strapping, and marked with heat numbers for full traceability. EN 10204 Type 3.1 certificates included complete chemical analysis and mechanical test data. Professional support throughout made this procurement seamless for our critical pharmaceutical project timeline.
用户
Michael Johnson
United States
2026-01-07
Excellent Quality 2 Inch 316 Pipe for Seawater System
We ordered 8 tons of 2 inch 316 stainless steel pipe (Schedule 40S, 60.3mm OD) for our desalination plant expansion project. Material certificates showed molybdenum content at 2.4%, carbon at 0.025%, fully compliant with ASTM A312. We conducted hydrostatic testing at 8 MPa and eddy current inspection - all results exceeded specifications. Surface finish was excellent 2B with Ra value of 0.48 μm, no visible defects or contamination. Delivered in 4 days, 1 day ahead of schedule with proper wooden crate packaging. This is our 4th order from this supplier. Quality has been consistently excellent for marine applications. Highly recommended for chloride-rich environments.

了解供应商

快马钢铁有限公司

入驻 Sinoali.com 7 年

所在地:China

可定制 超低价
$2650 1-49 吨 基准价
$2535 50-99 吨 4.3% 优惠
$2475 ≥100 吨 6.6% 优惠
价格有效期:随行就市

供应商定制能力

  • 来图定制
  • 来样定制
  • 全流程定制
数量

最小起订量: 1 吨

运费合计:面议

商品小计 US$ 2,650.00
分享:
发起订单请求
付款与交货
交期:
随报价一并确认
包装:
标准出口包装
样品:
可按需提供

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