Ms erw Pipes

Introduction: Choosing the Right Pipe Can Make or Break Your Project When it comes to industrial procurement, one wrong decision can cost lakhs. And in the world of steel piping, the most common confusion is this: Should you go for MS ERW Pipes or Seamless Pipes? At first glance, both may look similar. Same shape, same purpose. But the reality? Their performance, pricing, and applications are very different. If you’re a contractor, fabricator, or bulk buyer in India, this guide will help you make a clear, confident decision in 2026—based on real use cases, cost factors, and technical differences. If you want to calculate steel pipe weight per meter or per feet, check our updated MS Pipe Weight Calculator (2026) resource by Deal on steel Industries. What Are MS ERW Pipes? Let’s simplify this. MS ERW Pipes (Mild Steel Electric Resistance Welded Pipes) are made by rolling steel sheets into a cylindrical shape and welding the seam using electric resistance. Key Characteristics: Longitudinal welded joint Uniform wall thickness Smooth surface finish Cost-effective manufacturing Common Market Names: ms erw tube MS ERW Black Pipes ERW Black Steel Pipe ASTM A53 MS Black ERW Pipe Popular Brands in India: Jindal Make MS ERW Pipe Jindal Star MS Pipe TATA MS ERW Pipe TATA Steel MS ERW Pipe What Are Seamless Pipes? As the name suggests, seamless pipes have no weld joint. They are manufactured by piercing a solid billet of steel and then elongating it to form a hollow pipe. Key Characteristics: No welding seam Higher pressure resistance Stronger structure under extreme conditions Higher manufacturing cost Manufacturing Process: The Core Difference This is where the real difference begins. 🔹 MS ERW Pipes Manufacturing: Steel coil is rolled into a pipe Edges are heated using electric current Seam is welded and finished 👉 Result: A strong pipe, but with a weld joint 🔹 Seamless Pipes Manufacturing: Solid steel billet is heated Pierced through the center Stretched and shaped into a pipe 👉 Result: No joint, uniform structure throughout MS ERW Pipes vs Seamless Pipes: Detailed Comparison Let’s break it down practically. 1. Strength & Durability MS ERW Pipes: Strong enough for most applications Weld seam may be a weak point under extreme pressure Seamless Pipes: Superior strength Ideal for high-pressure and high-temperature environments 👉 Winner: Seamless Pipes (for extreme conditions) 2. Price Comparison (India 2026) Price is often the deciding factor. MS ERW Pipes: ₹55 – ₹75 per kg Affordable for bulk usage Widely available Seamless Pipes: ₹90 – ₹160 per kg (depending on grade) Expensive due to complex manufacturing 👉 Winner: MS ERW Pipes (budget-friendly) 3. Availability & Supply MS ERW Pipes: Easily available across India Multiple brands and suppliers Faster delivery Seamless Pipes: Limited availability Longer lead times 👉 Winner: MS ERW Pipes 4. Surface Finish & Uniformity MS ERW Pipes: Smooth finish Slight variation at weld seam Seamless Pipes: More uniform structure No seam marks 👉 Winner: Seamless Pipes. If you are searching for reliable Best MS Pipe Dealers in Ghaziabad. This guide will help you understand everything before placing your next order. 5. Pressure Handling Capacity MS ERW Pipes: Suitable for low to medium pressure Seamless Pipes: Ideal for high-pressure systems 👉 Winner: Seamless Pipes 6. Applications Comparison 🏗️ MS ERW Pipes Used In: Construction frameworks Structural fabrication Water pipelines Scaffolding ⚙️ Seamless Pipes Used In: Oil & gas industry Boilers & heat exchangers Chemical plants Power plants When Should You Choose MS ERW Pipes? Let’s make this practical. Choose MS ERW Pipes if: You are working on construction projects Budget is a concern You need bulk quantity Application is not high-pressure Real Example: A contractor building a warehouse structure will prefer MS ERW Black Pipes because: Lower cost Easy availability Sufficient strength When Should You Choose Seamless Pipes? Choose Seamless Pipes if: You are dealing with high-pressure systems Safety is critical Application involves heat or chemicals Real Example: A refinery pipeline cannot risk failure. Here, seamless pipes are the safer choice despite higher cost. Indian Market Insight 2026: What Buyers Are Choosing Here’s what’s actually happening in the market: 🔹 70–80% of B2B buyers prefer MS ERW Pipes Why? Cost efficiency Availability Suitable for most applications 🔹 Seamless Pipes are niche but critical Used only where required: Oil & gas Heavy engineering 🔹 Branded ERW Pipes Are Gaining Popularity Buyers now prefer: Jindal MS ERW Pipe & Tube TATA Steel MS ERW Pipe Reason: Better quality assurance Standard compliance Grades & Standards Comparison MS ERW Pipes: IS 1239 IS 3589 ASTM A53 MS Black ERW Pipe Seamless Pipes: ASTM A106 API 5L 👉 Always verify standards before purchase. Cost vs Performance: What Should You Prioritize? Here’s the honest truth: If you choose seamless everywhere → You’ll overspend If you choose ERW everywhere → You may risk failure in critical systems Smart Strategy: Use MS ERW Pipes for general applicationsUse Seamless Pipes only where necessary This hybrid approach is what most successful B2B buyers follow in 2026. Common Mistakes Buyers Make Avoid these costly errors: ❌ Using ERW pipes in high-pressure systems❌ Overpaying for seamless pipes in low-risk applications❌ Ignoring certification and standards❌ Not checking brand reliability Expert Buying Tips (2026 Updated) ✔ Always define your application first ✔ Compare cost vs risk ✔ Choose branded pipes for critical projects ✔ Verify thickness and grade ✔ Work with trusted suppliers Quick Decision Guide (Save This) Use Case Best Choice Construction MS ERW Pipes Structural Fabrication MS ERW Pipes Water Pipelines MS ERW Pipes Oil & Gas Seamless Pipes High Pressure Systems Seamless Pipes Conclusion: Which Pipe is Better? There’s no one-size-fits-all answer. MS ERW Pipes are the best choice for cost-effective, large-scale applications Seamless Pipes are ideal for critical, high-pressure environments So instead of asking “Which is better?”, ask: 👉 “Which is right for my project?” That’s how smart buyers make decisions in 2026. ✅ FAQs   1. What is the main difference between ERW and seamless pipes? ERW pipes have a welded seam, while seamless pipes are made

Introduction: Why Understanding MS ERW Pipe Prices Matters in 2026 If you’re a contractor, distributor, or industrial buyer, one thing is clear—MS ERW pipe price directly impacts your project cost and profit margins. And in 2026, pricing is no longer stable. Steel rates are fluctuating, demand from infrastructure projects is rising, and brand premiums are becoming more noticeable. So the real question is: Are you paying the right price for MS ERW pipes—or overpaying without realizing it? In this detailed guide, we’ll break down: Latest MS ERW pipe price trends Size-wise and brand-wise rate comparison Factors affecting pricing Practical B2B buying strategies This isn’t just theory. It’s a real-world, actionable pricing guide for serious buyers. If you want a deeper understanding of specifications, types, and real-world uses, you can explore our complete Breakdown MS ERW Pipes to make a more informed buying decision. What is MS ERW Pipe?   Before we jump into pricing, let’s quickly align. MS ERW Pipes (Mild Steel Electric Resistance Welded Pipes) are made by rolling steel sheets into a cylindrical shape and welding them longitudinally. Why they are widely used: Cost-effective compared to seamless pipes Uniform thickness Easy availability Suitable for structural & industrial use You’ll often see them in forms like: MS ERW Black Pipes ERW Black Steel Pipe ASTM A53 MS Black ERW Pipe MS ERW Pipe Price in India 2026 (Latest Market Rates) Let’s get straight to what you’re here for. 💰 Average Price Range (2026) ₹55 to ₹75 per kg – Standard MS ERW pipes ₹70 to ₹90 per kg – Premium branded pipes ⚠️ Note: Prices vary daily based on raw material cost (HR Coil) Size-Wise MS ERW Pipe Price List (2026) Below is an approximate B2B bulk price breakdown: 🔹 Small Diameter Pipes (½ inch to 1 inch) ₹60 – ₹75 per kg Common in furniture, light fabrication 🔹 Medium Diameter Pipes (1.25 inch to 4 inch) ₹58 – ₹72 per kg Widely used in construction & pipelines 🔹 Large Diameter Pipes (5 inch to 12 inch) ₹55 – ₹70 per kg Used in infrastructure & industrial projects 📌 Important Insight: Smaller pipes = higher processing cost = higher price per kg Larger pipes = lower per kg rate but higher total cost Brand-Wise MS ERW Pipe Price Comparison In B2B markets, brand matters—a lot. 🏭 Jindal MS ERW Pipe Price Popular variants: Jindal MS ERW Pipe & Tube Jindal Make MS ERW Pipe Jindal Star MS Pipe Price Range: ₹70 – ₹90 per kg Why higher price? Strong brand trust Consistent quality Nationwide supply chain 🏭 TATA MS ERW Pipe Price Variants: TATA MS ERW Pipe TATA Steel MS ERW Pipe Price Range: ₹72 – ₹92 per kg Best For: High-load structures Government & premium projects 🏭 Local / Unbranded Pipes Price Range: ₹55 – ₹68 per kg Pros: Lower cost Easy availability Cons: Quality inconsistency Risk of thickness variation Key Factors Affecting MS ERW Pipe Price in India Understanding this is where smart buyers win. 🔹 1. Raw Material Cost (HR Coil) This is the biggest factor. If steel prices increase → pipe prices increase If steel prices drop → pipe prices fall 🔹 2. Pipe Thickness (Gauge) Thicker pipes = more steel = higher price Even 1 mm difference can impact cost significantly 🔹 3. Pipe Diameter Smaller diameter = more processing = higher rate Larger diameter = lower per kg rate 🔹 4. Brand Value Jindal & TATA charge premium Local manufacturers offer lower pricing 🔹 5. Order Quantity Bulk orders = better negotiation Small orders = higher rates 🔹 6. Location & Logistics Transport cost affects final pricing Prices differ between cities MS ERW Pipe Price Trend (2023–2026 Analysis) Let’s look at how prices have evolved: 📊 Market Trend: 2023: ₹50–₹65/kg 2024: ₹55–₹70/kg 2025: ₹58–₹75/kg 2026: ₹60–₹80+/kg 📈 Why prices are rising: Infrastructure growth (roads, metro, rail) Increased steel demand Global supply chain disruptions If you are searching for reliable MS Pipe Dealers in Ghaziabad. This guide will help you understand everything before placing your next order. How to Calculate MS ERW Pipe Cost   If you’re a B2B buyer, you must know this. Step-by-step: Calculate pipe weight Multiply by price per kg Example: Pipe weight: 1000 kg Rate: ₹65/kg 👉 Total Cost = ₹65,000 Pro Tip: Always verify: Weight calculation Thickness tolerance Actual vs billed weight Bulk Buying Tips (Save 5–12% Cost Easily) Here’s where you gain an edge. ✔️ 1. Buy in Bulk Larger orders = better discounts ✔️ 2. Compare Multiple Suppliers Don’t settle for the first quote. ✔️ 3. Negotiate on Transport Ask for delivered pricing (including freight) ✔️ 4. Lock Prices in Advance Useful during volatile market conditions ✔️ 5. Choose Right Brand Mix Use premium pipes where needed Use local pipes for non-critical applications Common Pricing Mistakes to Avoid Even experienced buyers make these mistakes: ❌ Ignoring thickness variation❌ Not checking actual weight❌ Buying only based on lowest price❌ Not verifying IS standards❌ Skipping supplier background check How to Choose the Right Supplier Your supplier decides your long-term profitability. Look for: Consistent stock availability Transparent pricing Proper billing & GST compliance Test certificates Red Flags: Unusually low prices No documentation Inconsistent supply Latest Buying Trend in 2026 (Important Insight) 🔹 Digital Procurement is Rising Buyers now: Compare prices online Request multiple quotations Negotiate digitally 🔹 Brand Preference Increasing More B2B buyers are choosing: Jindal Star MS Pipe TATA Steel MS ERW Pipe Because:👉 Quality failures cost more than price savings Final Thoughts: Price Matters, But Value Matters More Yes, MS ERW pipe price is important. But the smartest buyers in 2026 are not chasing the lowest price—they are focusing on: Quality Reliability Supplier trust Because one bad batch of pipes can cost more than the entire savings. So next time you compare prices, ask yourself: 👉 “Am I buying cheap—or am I buying smart?” Still confused about which pipe suits your requirement? This detailed overview of MS ERW Pipes will help you understand their advantages, applications, and buying factors

Introduction: Why MS ERW Pipes Are Still Dominating in 2026 If you’re in construction, fabrication, or industrial supply, you already know one thing—MS ERW Pipes are everywhere. From infrastructure projects to factory pipelines, these pipes have become the backbone of modern development in India. But here’s the real question:Are you buying the right quality at the right price? With fluctuating steel prices, multiple brands, and varying standards, choosing the right MS ERW pipe in 2026 isn’t as simple as it used to be. This guide will help you understand everything—types, applications, pricing trends, and how to make a smart purchase decision. If you want to calculate steel pipe weight per meter or per feet, check our updated MS Pipe Weight Calculator (2026) resource by Deal on steel Industries. What Are MS ERW Pipes? MS ERW Pipes (Mild Steel Electric Resistance Welded Pipes) are manufactured by rolling steel sheets and welding them longitudinally using electric resistance. In simple terms: Steel coil → rolled into a pipe → welded → finished product These pipes are known for: Uniform thickness Smooth finish High strength Cost-effectiveness You’ll often hear terms like: ms erw tube ERW Black Steel Pipe MS ERW Black Pipes All refer to similar welded pipe categories, with slight differences in finish and usage. Before finalizing your purchase, it’s smart to check the latest MS pipe price in India to compare rates and get the best deal in today’s market. Types of MS ERW Pipes in India 1. MS ERW Black Pipes These are the most commonly used pipes in India. Features: Raw black finish Cost-effective Ideal for structural and industrial use Popular variants: MS ERW Black Pipes ms erw black pipes ASTM A53 MS Black ERW Pipe Best For: Construction frameworks Water pipelines Scaffolding 2. Galvanized ERW Pipes (GI Pipes) These are coated with zinc for corrosion resistance. Best For: Plumbing Outdoor structures Water supply systems 3. Branded ERW Pipes When it comes to reliability, branded pipes dominate the B2B market. Jindal Pipes Jindal MS ERW Pipe & Tube Jindal Make MS ERW Pipe Jindal Star MS Pipe Known for: Consistent quality Strong brand trust Nationwide availability TATA Pipes TATA MS ERW Pipe TATA Steel MS ERW Pipe Preferred for: High-strength applications Premium infrastructure projects Applications of MS ERW Pipes (Real-World Use Cases) Let’s move beyond theory. Where are MS ERW Pipes actually used? 🏗️ Construction Industry Structural frameworks Columns and beams Roofing support 🏭 Industrial Use Machinery pipelines Boiler connections Fluid transport 🚜 Agriculture Borewell casing Irrigation systems 🚧 Infrastructure Projects Bridges Metro projects Highway railings Example:In large-scale metro projects across India (like Delhi & Mumbai expansions), ERW Black Steel Pipe is widely used for structural and utility frameworks. MS ERW Pipes Price Trends in India 2026 Steel prices have seen volatility over the past few years—and 2026 is no different. Current Market Trends: Prices fluctuate based on raw material (HR coil) rates Demand from infrastructure sector is rising Import-export policies impact pricing Average Price Range (2026) (Indicative for bulk buyers) ₹55 – ₹75 per kg (standard grade) Premium brands like Jindal Star MS Pipe and TATA Steel MS ERW Pipe may cost slightly higher Key Factors Affecting Price: Steel coil rates Pipe thickness (schedule) Brand value Order quantity Location & logistics Grades & Standards You Must Know If you’re a serious buyer, don’t ignore this section. Common Standards: IS 1239 – Medium & light pipes IS 3589 – Heavy-duty pipes ASTM A53 MS Black ERW Pipe – International standard Why It Matters: Ensures durability Avoids project failure Meets compliance requirements MS ERW Pipes vs Seamless Pipes Feature MS ERW Pipes Seamless Pipes Manufacturing Welded No weld Cost Affordable Expensive Strength Good Very high Use Case General purpose High-pressure systems 👉 For most B2B applications, MS ERW Pipes offer the best cost-performance ratio. If you want to clearly understand the real difference between these two types, check out our MS ERW Pipes vs Seamless Pipes comparison guide for a detailed breakdown. How to Choose the Right MS ERW Pipe (Buyer’s Checklist) Before placing your next bulk order, ask yourself: ✔️ 1. What is the application? Structural? Go for standard ERW Pressure use? Choose higher grade ✔️ 2. Brand or Local? For reliability → Jindal Make MS ERW Pipe For budget → Local manufacturers ✔️ 3. Check thickness & diameter Always verify: OD (Outer Diameter) Wall thickness ✔️ 4. Certification matters Look for: ISI mark Test certificates ✔️ 5. Supplier credibility Work with trusted suppliers who: Offer consistent stock Provide competitive pricing Ensure timely delivery Latest Trends in MS ERW Pipe Industry (2026) Here’s what’s changing in the market: 🔹 1. Rising Demand from Infrastructure Government projects are pushing demand upward. 🔹 2. Shift Towards Branded Pipes Buyers prefer TATA MS ERW Pipe and Jindal MS ERW Pipe & Tube for long-term reliability. 🔹 3. Digital Procurement B2B buyers are now sourcing pipes online with price comparison tools. 🔹 4. Focus on Quality Over Price Cheap pipes = higher long-term cost. Common Mistakes B2B Buyers Make Avoid these if you want better ROI: ❌ Choosing lowest price without quality check❌ Ignoring pipe thickness tolerance❌ Not verifying standards (IS/ASTM)❌ Buying from unverified suppliers Conclusion: Make Smarter Buying Decisions MS ERW Pipes are not just a commodity—they’re a critical part of your project’s strength and longevity. Whether you’re sourcing MS ERW Black Pipes, Jindal Star MS Pipe, or TATA Steel MS ERW Pipe, your focus should be on: Quality Standard compliance Reliable supplier So next time you’re placing an order, don’t just compare prices—compare value. ✅ FAQs  1. What are MS ERW Pipes used for? MS ERW Pipes are used in construction, infrastructure, industrial pipelines, and agriculture due to their strength and affordability. 2. What is the price of MS ERW Pipes in India in 2026? The average price ranges between ₹55 to ₹75 per kg depending on brand, thickness, and quantity. 3. Which is better: Jindal or TATA MS ERW Pipe? Both are premium brands. Jindal is widely used for general

MS Pipe Demand in India 2026: Price Trends, Construction Uses & Market Growth Analysis If you’re in the steel or construction business, you’ve probably noticed one thing lately—MS pipes are everywhere. From small fabrication shops to massive infrastructure projects, the demand is rising fast. But here’s what most buyers and suppliers are still trying to figure out: 👉 Is MS pipe demand in India 2026 actually growing—or just temporary hype?👉 And how do price trends impact your profit margins? Let’s break it down in a simple, practical, and business-focused way. 📊 MS Pipe Demand in India 2026: Market Overview The MS pipe demand in India 2026 is seeing consistent growth due to multiple sectors expanding at once. 🔥 Key Growth Drivers Rapid infrastructure development (roads, highways, metros) Real estate and housing boom Industrial expansion (factories, warehouses) Government initiatives like Smart Cities Mission 👉 Simply put, wherever there is construction, MS pipes are involved. 📈 Steel Pipe Market Growth in India (2026 Insights) The steel pipe market growth in India is not just steady—it’s accelerating. 📌 What’s Fueling This Growth? Increase in urban population Expansion of industrial corridors Rise in private construction projects Growing export demand 📊 Market Trend Insight Tier 2 & Tier 3 cities are driving new demand Bulk buying by contractors is increasing Demand cycles are becoming faster 👉 This is why bulk MS pipe suppliers in India are seeing higher order volumes in 2026. 💰 MS Pipe Price Trends in India 2026 Let’s talk about what matters most—price. 🔢 Steel Pipe Price per KG in India Average MS pipe price: ₹55 – ₹75 per kg Premium brands: ₹70 – ₹85 per kg Bulk orders: Lower negotiated rates 📉 What Affects MS Pipe Prices? Raw material (iron & steel) cost fluctuations Transportation and logistics Demand-supply gap Government policies and taxes 👉 Prices are slightly volatile in 2026 due to global steel market changes. 📊 Price Trend Observation (2026) Q1–Q2: Stable demand with slight price increase Q3–Q4: Expected surge due to infrastructure push 👉 Smart buyers are locking prices early to avoid future hikes. 🏗️ Construction Uses of MS Pipes (High Demand Sectors) MS pipes are one of the most versatile materials in construction. 🏢 1. Structural Applications Building frameworks Columns and supports Roofing structures 🏭 2. Industrial Usage Factory pipelines Machinery structures Storage units 🚧 3. Infrastructure Projects Bridges and flyovers Metro rail projects Highway constructions 🛠️ 4. Fabrication & Engineering Gates, grills, railings Furniture frames Custom metal works 👉 This wide usage is the main reason behind the rising infrastructure pipe demand in India. 📦 Demand by Sector (2026 Breakdown) 🏗️ Real Estate High consumption of MS pipes Continuous demand cycle 🏭 Manufacturing Stable and long-term demand 🚿 Water & Utility Moderate demand (DI pipes dominate here) 📊 Pipe Industry Trends 2026 (Must Know for B2B Buyers) Here are the latest pipe industry trends 2026 you should not ignore: 1. 📈 Bulk Buying is Increasing Contractors and builders prefer direct deals with manufacturers. 2. 💸 Price Sensitivity is High Even ₹2–₹3/kg difference impacts bulk deals. 3. 🏭 Shift Towards Branded Suppliers Buyers prefer trusted brands for quality assurance. 4. 📊 Digital Procurement Growth Online inquiries and B2B platforms are increasing. 💼 Profit Analysis: MS Pipe Business in 2026 If you’re a trader or supplier, here’s the real picture: 📊 Advantages High demand volume Fast inventory turnover Easy availability ⚠️ Challenges Thin profit margins High competition Price fluctuations 💡 Profit Tip 👉 Focus on: Bulk deals Long-term contracts Reliable supplier network This is where most successful bulk MS pipe suppliers in India are winning. 🔗 Internal Resources (Must Explore) 👉 Latest MS Pipe Price List in India 👉 MS Pipe Sizes & Weight Chart Guide 🧠 Expert Buying Tips (2026) Before placing a bulk order, always check: ISI certification Pipe thickness accuracy Brand reputation Delivery timeline 👉 Don’t just chase low price—focus on consistent quality. 🤔 Is MS Pipe Demand Sustainable in India? Short answer: Yes, but with competition. MS pipes will continue to dominate: Construction sector Fabrication market Industrial usage However, in water supply projects, DI pipes will grow faster. 👉 So the demand is strong—but smart positioning is key. 📌 Conclusion The MS pipe demand in India 2026 is not just growing—it’s evolving. Construction and infrastructure are driving massive demand Prices are fluctuating but manageable Profit depends on volume and smart sourcing If you’re in B2B, this is the right time to: 👉 Build supplier relationships👉 Lock better pricing👉 Focus on bulk opportunities About Company At Dealonsteel, we are committed to being a leading supplier of high-quality stainless steel products. With a vision to deliver excellence and a focus on customer satisfaction, we provide a comprehensive range of stainless steel solutions to meet diverse needs. Most Recent Posts All Posts Ms erw Pipes Seamless Boiler Tubes Stainless Steel Coils stainless steel fittings Stainless steel Flanges Stainless Steel Pipes Stainless steel sheets Stainless steel Tubes Steel Prices Trending Steel   Back Alloy Steel Boiler Tubes Carbon Steel Boiler Tubes Stainless Steel Boiler Tubes Jindal Boiler Tubes TATA Boiler Tubes ERW Boiler Tubes MS Pipe Demand in India 2026: Price Trends, Construction Uses & Market Growth Analysis MS Pipe vs DI Pipe Demand & Price in India 2026: Market Growth, Uses & Profit Analysis 📊 Steel Price Forecast 2026: Will Rates Go Higher or Drop? Industry Insights 💡 Best Time to Buy Steel in 2026: Expert Tips to Save Big on Pipes & Materials 🔥 Why Steel Prices Are Increasing in 2026? Complete Market Breakdown for Buyers Steel Prices Suddenly Rising – Buyers Should Read This Before Purchase Green Steel & Low-Carbon Steel Pipes: The Future of India’s Industrial Infrastructure Alloy Steel Boiler Tubes – Durable, High-Performance Tubing Category Ms erw Pipes (2) Seamless Boiler Tubes (1) Stainless Steel Coils (1) Stainless Steel Pipes (8) Stainless steel Tubes (1) Steel Prices (4) Trending Steel (2) Uncategorized (6) Tags 316 stainless steel manufacturer mild steel ms erw pipes ms pipes ms pipes supplier ms specifications ss pipes supply ss seamless ss seamless pipes ss tubes stainless steel